diff --git a/.gitignore b/.gitignore
index ebd791d30..15c5f26c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 node_modules
+dist
 .cache
 .env
 src/lib/gramjs/build/
diff --git a/src/components/common/Audio.tsx b/src/components/common/Audio.tsx
index f047892df..60a38ef6c 100644
--- a/src/components/common/Audio.tsx
+++ b/src/components/common/Audio.tsx
@@ -1,10 +1,12 @@
 import React, {
   FC, memo, useCallback, useEffect, useMemo, useRef, useState,
 } from '../../lib/teact/teact';
+import { withGlobal } from '../../lib/teact/teactn';
 
 import {
   ApiAudio, ApiMessage, ApiVoice,
 } from '../../api/types';
+import { ISettings } from '../../types';
 
 import { IS_MOBILE_SCREEN } from '../../util/environment';
 import { formatMediaDateTime, formatMediaDuration, formatPastTimeShort } from '../../util/dateFormat';
@@ -49,6 +51,10 @@ type OwnProps = {
   onDateClick?: (messageId: number, chatId: number) => void;
 };
 
+type StateProps = {
+  theme: ISettings['theme'];
+};
+
 interface ISeekMethods {
   handleStartSeek: (e: React.MouseEvent<HTMLElement>) => void;
   handleSeek: (e: React.MouseEvent<HTMLElement>) => void;
@@ -61,7 +67,8 @@ const MAX_SPIKES = IS_MOBILE_SCREEN ? 50 : 75;
 // This is needed for browsers requiring user interaction before playing.
 const PRELOAD = true;
 
-const Audio: FC<OwnProps> = ({
+const Audio: FC<OwnProps & StateProps> = ({
+  theme,
   message,
   senderTitle,
   uploadProgress,
@@ -201,8 +208,8 @@ const Audio: FC<OwnProps> = ({
   const seekHandlers = { handleStartSeek, handleSeek, handleStopSeek };
   const isOwn = isOwnMessage(message);
   const renderedWaveform = useMemo(
-    () => voice && renderWaveform(voice, playProgress, isOwn, seekHandlers),
-    [voice, playProgress, isOwn, seekHandlers],
+    () => voice && renderWaveform(voice, playProgress, isOwn, seekHandlers, theme),
+    [voice, playProgress, isOwn, seekHandlers, theme],
   );
 
   const fullClassName = buildClassName(
@@ -346,7 +353,11 @@ function renderVoice(voice: ApiVoice, renderedWaveform: any, isMediaUnread?: boo
 }
 
 function renderWaveform(
-  voice: ApiVoice, playProgress = 0, isOwn = false, { handleStartSeek, handleSeek, handleStopSeek }: ISeekMethods,
+  voice: ApiVoice,
+  playProgress = 0,
+  isOwn = false,
+  { handleStartSeek, handleSeek, handleStopSeek }: ISeekMethods,
+  theme: ISettings['theme'],
 ) {
   const { waveform, duration } = voice;
 
@@ -354,14 +365,18 @@ function renderWaveform(
     return undefined;
   }
 
+  const fillColor = theme === 'dark' ? '#494B75' : '#CBCBCB';
+  const fillOwnColor = theme === 'dark' ? '#C69C85' : '#B0DEA6';
+  const progressFillColor = theme === 'dark' ? '#868DF5' : '#54a3e6';
+  const progressFillOwnColor = theme === 'dark' ? '#FFFFFF' : '#53ad53';
   const durationFactor = Math.min(duration / AVG_VOICE_DURATION, 1);
   const spikesCount = Math.round(MIN_SPIKES + (MAX_SPIKES - MIN_SPIKES) * durationFactor);
   const decodedWaveform = decodeWaveform(new Uint8Array(waveform));
   const { data: spikes, peak } = interpolateArray(decodedWaveform, spikesCount);
   const { src, width, height } = renderWaveformToDataUri(spikes, playProgress, {
     peak,
-    fillStyle: isOwn ? '#B0DEA6' : '#CBCBCB',
-    progressFillStyle: isOwn ? '#53ad53' : '#54a3e6',
+    fillStyle: isOwn ? fillOwnColor : fillColor,
+    progressFillStyle: isOwn ? progressFillOwnColor : progressFillColor,
   });
 
   return (
@@ -414,4 +429,4 @@ function renderSeekline(
   );
 }
 
-export default memo(Audio);
+export default memo(withGlobal<OwnProps>((global) => ({ theme: global.settings.byKey.theme }))(Audio));
diff --git a/src/components/common/Avatar.scss b/src/components/common/Avatar.scss
index a90a5dd5f..8a1f1465e 100644
--- a/src/components/common/Avatar.scss
+++ b/src/components/common/Avatar.scss
@@ -6,7 +6,7 @@
   width: 3.375rem;
   height: 3.375rem;
   border-radius: 50%;
-  background: linear-gradient(white -125%, var(--color-user));
+  background: linear-gradient(var(--color-white) -125%, var(--color-user));
   color: white;
   font-weight: bold;
   display: flex;
@@ -109,7 +109,7 @@
       width: 0.875rem;
       height: 0.875rem;
       border-radius: 50%;
-      border: 2px solid white;
+      border: 2px solid var(--color-background);
       background-color: #0ac630;
       flex-shrink: 0;
     }
diff --git a/src/components/common/EmbeddedMessage.scss b/src/components/common/EmbeddedMessage.scss
index 256ce04a0..83d196c3e 100644
--- a/src/components/common/EmbeddedMessage.scss
+++ b/src/components/common/EmbeddedMessage.scss
@@ -21,7 +21,7 @@
     padding: 0.5rem;
     margin: 0;
     background-color: var(--background-color);
-    box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 1px 2px var(--color-default-shadow);
 
     &::before {
       left: .625rem;
diff --git a/src/components/common/File.scss b/src/components/common/File.scss
index 01bad572e..dd315bee9 100644
--- a/src/components/common/File.scss
+++ b/src/components/common/File.scss
@@ -158,7 +158,7 @@
   }
 
   &.smaller {
-    --background-color: #fff;
+    --background-color: var(--color-background);
     --border-radius-messages-small: .3125rem;
 
     .icon-download,
diff --git a/src/components/common/LastMessageMeta.scss b/src/components/common/LastMessageMeta.scss
index 83b045f01..4c1acad82 100644
--- a/src/components/common/LastMessageMeta.scss
+++ b/src/components/common/LastMessageMeta.scss
@@ -8,7 +8,7 @@
   align-items: center;
 
   .MessageOutgoingStatus {
-    color: var(--color-text-green);
+    color: var(--color-text-meta-colored);
     margin-right: 0.1rem;
     font-size: 1.15rem;
   }
diff --git a/src/components/common/StickerSetModal.scss b/src/components/common/StickerSetModal.scss
index 06bdd81b6..40bc0c28a 100644
--- a/src/components/common/StickerSetModal.scss
+++ b/src/components/common/StickerSetModal.scss
@@ -32,7 +32,7 @@
   .button-wrapper {
     padding: 0.5rem 0;
     border-top: 1px solid var(--color-borders);
-    box-shadow: 0 0 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 0 2px var(--color-default-shadow);
 
     button {
       display: inline-block;
diff --git a/src/components/common/UiLoader.scss b/src/components/common/UiLoader.scss
index 1eca85ae1..4149c76f9 100644
--- a/src/components/common/UiLoader.scss
+++ b/src/components/common/UiLoader.scss
@@ -18,7 +18,7 @@
 
     .left {
       flex: 1;
-      background: white;
+      background: var(--color-background);
       min-width: 15.5rem;
       max-width: 26.5rem;
 
@@ -56,10 +56,19 @@
         left: 0;
         bottom: 0;
         right: 0;
-        background: rgb(230, 235, 238) url('../../assets/chat-bg.jpg') no-repeat center;
+        background: no-repeat center;
         background-size: cover;
         z-index: -1;
         transform-origin: left center;
+
+        .theme-dark body.initial & {
+          background-color: #0f0f0f;
+        }
+
+        .theme-light body.initial &,
+        body:not(.initial) & {
+          background-image: url('../../assets/chat-bg.jpg');
+        }
       }
 
       &.with-right-column::before {
@@ -97,12 +106,12 @@
       min-width: 15.5rem;
       max-width: 26.5rem;
       border-left: 1px solid var(--color-borders);
-      background: white;
+      background: var(--color-background);
     }
   }
 
   .blank {
     flex: 1;
-    background: white;
+    background: var(--color-background);
   }
 }
diff --git a/src/components/common/UiLoader.tsx b/src/components/common/UiLoader.tsx
index bba3d1990..9307ab475 100644
--- a/src/components/common/UiLoader.tsx
+++ b/src/components/common/UiLoader.tsx
@@ -32,6 +32,7 @@ type OwnProps = {
 
 type StateProps = Pick<GlobalState, 'uiReadyState'> & {
   hasCustomBackground?: boolean;
+  isCustomBackgroundColor: boolean;
   isRightColumnShown?: boolean;
 };
 
@@ -84,6 +85,7 @@ const UiLoader: FC<OwnProps & StateProps & DispatchProps> = ({
   page,
   children,
   hasCustomBackground,
+  isCustomBackgroundColor,
   isRightColumnShown,
   setIsUiReady,
 }) => {
@@ -129,7 +131,8 @@ const UiLoader: FC<OwnProps & StateProps & DispatchProps> = ({
               <div
                 className={buildClassName(
                   'middle',
-                  hasCustomBackground && 'custom-bg-image',
+                  hasCustomBackground && !isCustomBackgroundColor && 'custom-bg-image',
+                  hasCustomBackground && isCustomBackgroundColor && 'custom-bg-color',
                   isRightColumnShown && 'with-right-column',
                 )}
               />
@@ -149,6 +152,7 @@ export default withGlobal<OwnProps>(
     return {
       uiReadyState: global.uiReadyState,
       hasCustomBackground: Boolean(global.settings.byKey.customBackground),
+      isCustomBackgroundColor: Boolean((global.settings.byKey.customBackground || '').match(/^#[a-f\d]{6,8}$/i)),
       isRightColumnShown: selectIsRightColumnShown(global),
     };
   },
diff --git a/src/components/left/main/Chat.scss b/src/components/left/main/Chat.scss
index 9de407746..55860eec1 100644
--- a/src/components/left/main/Chat.scss
+++ b/src/components/left/main/Chat.scss
@@ -1,5 +1,5 @@
 .Chat {
-  --background-color: white;
+  --background-color: var(--color-background);
 
   position: absolute;
   top: 0;
diff --git a/src/components/left/main/LeftMain.tsx b/src/components/left/main/LeftMain.tsx
index 0c87192e4..7966bdad7 100644
--- a/src/components/left/main/LeftMain.tsx
+++ b/src/components/left/main/LeftMain.tsx
@@ -118,7 +118,6 @@ const LeftMain: FC<OwnProps & StateProps> = ({
         onSearchQuery={onSearchQuery}
         onSelectSettings={handleSelectSettings}
         onSelectContacts={handleSelectContacts}
-        onSelectNewGroup={handleSelectNewGroup}
         onSelectArchived={handleSelectArchived}
         onReset={onReset}
       />
diff --git a/src/components/left/main/LeftMainHeader.scss b/src/components/left/main/LeftMainHeader.scss
index 54f9fa9fa..b6aa50157 100644
--- a/src/components/left/main/LeftMainHeader.scss
+++ b/src/components/left/main/LeftMainHeader.scss
@@ -45,7 +45,7 @@
   .archived-badge {
     min-width: 1.5rem;
     height: 1.5rem;
-    margin-left: 2rem;
+    margin-left: auto;
     background: var(--color-gray);
     border-radius: 0.75rem;
     padding: 0 .45rem;
diff --git a/src/components/left/main/LeftMainHeader.tsx b/src/components/left/main/LeftMainHeader.tsx
index 3ef0c5655..a2651c054 100644
--- a/src/components/left/main/LeftMainHeader.tsx
+++ b/src/components/left/main/LeftMainHeader.tsx
@@ -4,7 +4,7 @@ import React, {
 import { withGlobal } from '../../../lib/teact/teactn';
 
 import { GlobalActions } from '../../../global/types';
-import { LeftColumnContent } from '../../../types';
+import { LeftColumnContent, ISettings } from '../../../types';
 import { ApiChat } from '../../../api/types';
 
 import { IS_MOBILE_SCREEN } from '../../../util/environment';
@@ -12,6 +12,7 @@ import buildClassName from '../../../util/buildClassName';
 import { pick } from '../../../util/iteratees';
 import { isChatArchived } from '../../../modules/helpers';
 import { formatDateToString } from '../../../util/dateFormat';
+import switchTheme from '../../../util/switchTheme';
 import useLang from '../../../hooks/useLang';
 
 import DropdownMenu from '../../ui/DropdownMenu';
@@ -19,6 +20,7 @@ import MenuItem from '../../ui/MenuItem';
 import Button from '../../ui/Button';
 import SearchInput from '../../ui/SearchInput';
 import PickerSelectedItem from '../../common/PickerSelectedItem';
+import Switcher from '../../ui/Switcher';
 
 import './LeftMainHeader.scss';
 
@@ -28,7 +30,6 @@ type OwnProps = {
   onSearchQuery: (query: string) => void;
   onSelectSettings: () => void;
   onSelectContacts: () => void;
-  onSelectNewGroup: () => void;
   onSelectArchived: () => void;
   onReset: () => void;
 };
@@ -39,11 +40,15 @@ type StateProps = {
   currentUserId?: number;
   globalSearchChatId?: number;
   searchDate?: number;
+  theme: ISettings['theme'];
+  animationLevel: 0 | 1 | 2;
   chatsById?: Record<number, ApiChat>;
 };
 
 type DispatchProps = Pick<GlobalActions,
-'openChat'| 'openSupportChat' | 'setGlobalSearchDate' | 'setGlobalSearchChatId'>;
+'openChat'| 'openSupportChat' | 'setGlobalSearchDate' | 'setGlobalSearchChatId' | 'setSettingOption'>;
+
+const ANIMATION_LEVEL_OPTIONS = [0, 1, 2];
 
 const LeftMainHeader: FC<OwnProps & StateProps & DispatchProps> = ({
   content,
@@ -51,7 +56,6 @@ const LeftMainHeader: FC<OwnProps & StateProps & DispatchProps> = ({
   onSearchQuery,
   onSelectSettings,
   onSelectContacts,
-  onSelectNewGroup,
   onSelectArchived,
   setGlobalSearchChatId,
   onReset,
@@ -60,10 +64,13 @@ const LeftMainHeader: FC<OwnProps & StateProps & DispatchProps> = ({
   currentUserId,
   globalSearchChatId,
   searchDate,
+  theme,
+  animationLevel,
   chatsById,
   openChat,
   openSupportChat,
   setGlobalSearchDate,
+  setSettingOption,
 }) => {
   const hasMenu = content === LeftColumnContent.ChatList;
   const clearedDateSearchParam = { date: undefined };
@@ -113,6 +120,28 @@ const LeftMainHeader: FC<OwnProps & StateProps & DispatchProps> = ({
     openChat({ id: currentUserId });
   }, [currentUserId, openChat]);
 
+  const handleDarkModeToggle = useCallback((e: React.SyntheticEvent<HTMLDivElement>) => {
+    e.stopPropagation();
+    const newTheme = theme === 'light' ? 'dark' : 'light';
+
+    setSettingOption({
+      theme: newTheme,
+      customBackground: newTheme === 'dark' ? '#0F0F0F' : undefined,
+    });
+    switchTheme(newTheme, animationLevel > 0);
+  }, [animationLevel, setSettingOption, theme]);
+
+  const handleAnimationLevelChange = useCallback((e: React.SyntheticEvent<HTMLDivElement>) => {
+    e.stopPropagation();
+
+    const newLevel = animationLevel === 0 ? 2 : 0;
+    ANIMATION_LEVEL_OPTIONS.forEach((_, i) => {
+      document.body.classList.toggle(`animation-level-${i}`, newLevel === i);
+    });
+
+    setSettingOption({ animationLevel: newLevel });
+  }, [animationLevel, setSettingOption]);
+
   const lang = useLang();
 
   const isSearchFocused = Boolean(globalSearchChatId)
@@ -130,10 +159,19 @@ const LeftMainHeader: FC<OwnProps & StateProps & DispatchProps> = ({
           trigger={MainButton}
         >
           <MenuItem
-            icon="group"
-            onClick={onSelectNewGroup}
+            icon="saved-messages"
+            onClick={handleSelectSaved}
           >
-            {lang('NewGroup')}
+            {lang('SavedMessages')}
+          </MenuItem>
+          <MenuItem
+            icon="archive"
+            onClick={onSelectArchived}
+          >
+            <span className="menu-item-name">{lang('ArchivedChats')}</span>
+            {archivedUnreadChatsCount > 0 && (
+              <div className="archived-badge">{archivedUnreadChatsCount}</div>
+            )}
           </MenuItem>
           <MenuItem
             icon="user"
@@ -141,27 +179,34 @@ const LeftMainHeader: FC<OwnProps & StateProps & DispatchProps> = ({
           >
             {lang('Contacts')}
           </MenuItem>
-          <MenuItem
-            icon="archive"
-            onClick={onSelectArchived}
-          >
-            {lang('Archived')}
-            {archivedUnreadChatsCount > 0 && (
-              <div className="archived-badge">{archivedUnreadChatsCount}</div>
-            )}
-          </MenuItem>
-          <MenuItem
-            icon="saved-messages"
-            onClick={handleSelectSaved}
-          >
-            {lang('Saved')}
-          </MenuItem>
           <MenuItem
             icon="settings"
             onClick={onSelectSettings}
           >
             {lang('Settings')}
           </MenuItem>
+          <MenuItem
+            icon="darkmode"
+            onClick={handleDarkModeToggle}
+          >
+            <span className="menu-item-name">Dark Mode</span>
+            <Switcher
+              id="darkmode"
+              label="Toggle Dark Mode"
+              checked={theme === 'dark'}
+            />
+          </MenuItem>
+          <MenuItem
+            icon="animations"
+            onClick={handleAnimationLevelChange}
+          >
+            <span className="menu-item-name">{lang('SettingsSearch.Synonyms.Appearance.Animations')}</span>
+            <Switcher
+              id="animations"
+              label="Toggle Animations"
+              checked={animationLevel > 0}
+            />
+          </MenuItem>
           <MenuItem
             icon="help"
             onClick={openSupportChat}
@@ -213,6 +258,7 @@ export default memo(withGlobal<OwnProps>(
     } = global.globalSearch;
     const { currentUserId } = global;
     const { byId: chatsById } = global.chats;
+    const { theme, animationLevel } = global.settings.byKey;
 
     return {
       searchQuery,
@@ -221,6 +267,8 @@ export default memo(withGlobal<OwnProps>(
       chatsById,
       globalSearchChatId: chatId,
       searchDate: date,
+      theme,
+      animationLevel,
     };
   },
   (setGlobal, actions): DispatchProps => pick(actions, [
@@ -228,5 +276,6 @@ export default memo(withGlobal<OwnProps>(
     'openSupportChat',
     'setGlobalSearchDate',
     'setGlobalSearchChatId',
+    'setSettingOption',
   ]),
 )(LeftMainHeader));
diff --git a/src/components/left/search/LeftSearch.scss b/src/components/left/search/LeftSearch.scss
index adb84eb73..5747a21c7 100644
--- a/src/components/left/search/LeftSearch.scss
+++ b/src/components/left/search/LeftSearch.scss
@@ -163,7 +163,7 @@
     justify-content: space-between;
     align-items: flex-end;
     box-shadow: inset 0 -1px 0 0 var(--color-borders);
-    background-color: white;
+    background-color: var(--color-background);
     -webkit-overflow-scrolling: touch;
     overflow-x: auto;
     overflow-y: hidden;
diff --git a/src/components/left/settings/SettingsGeneralBackgroundColor.scss b/src/components/left/settings/SettingsGeneralBackgroundColor.scss
index 63b9000a8..ecd2406b8 100644
--- a/src/components/left/settings/SettingsGeneralBackgroundColor.scss
+++ b/src/components/left/settings/SettingsGeneralBackgroundColor.scss
@@ -31,7 +31,7 @@
     left: -0.75rem;
     width: 1.5rem;
     height: 1.5rem;
-    border: 0.125rem solid white;
+    border: 0.125rem solid var(--color-white);
     border-radius: 0.75rem;
     cursor: grab;
   }
@@ -66,12 +66,12 @@
 
     div {
       cursor: pointer;
-      box-shadow: inset 0 0 0 0 white;
+      box-shadow: inset 0 0 0 0 var(--color-background);
       transition: box-shadow 300ms ease;
 
       &.active {
         border: 0.125rem solid var(--color-primary);
-        box-shadow: inset 0 0 0 0.3125rem white;
+        box-shadow: inset 0 0 0 0.3125rem var(--color-background);
       }
 
       // A hack to make a square
diff --git a/src/components/left/settings/folders/SettingsFoldersChatsPicker.scss b/src/components/left/settings/folders/SettingsFoldersChatsPicker.scss
index 4dae4c3cd..9b64dc09e 100644
--- a/src/components/left/settings/folders/SettingsFoldersChatsPicker.scss
+++ b/src/components/left/settings/folders/SettingsFoldersChatsPicker.scss
@@ -2,7 +2,7 @@
   height: calc(100% - var(--header-height));
 
   .picker-header {
-    box-shadow: 0 0 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 0 2px var(--color-default-shadow);
 
     .max-items-reached {
       margin-bottom: 0.5rem;
diff --git a/src/components/main/Main.tsx b/src/components/main/Main.tsx
index 5952e3ea3..7221b38b9 100644
--- a/src/components/main/Main.tsx
+++ b/src/components/main/Main.tsx
@@ -9,6 +9,7 @@ import { pick } from '../../util/iteratees';
 import { selectIsForwardModalOpen, selectIsMediaViewerOpen, selectIsRightColumnShown } from '../../modules/selectors';
 import { dispatchHeavyAnimationEvent } from '../../hooks/useHeavyAnimationCheck';
 import useShowTransition from '../../hooks/useShowTransition';
+import buildClassName from '../../util/buildClassName';
 
 import LeftColumn from '../left/LeftColumn';
 import MiddleColumn from '../middle/MiddleColumn';
@@ -19,7 +20,6 @@ import Notifications from './Notifications.async';
 import Errors from './Errors.async';
 
 import './Main.scss';
-import buildClassName from '../../util/buildClassName';
 
 type StateProps = {
   animationLevel: number;
diff --git a/src/components/mediaViewer/ZoomControls.scss b/src/components/mediaViewer/ZoomControls.scss
index cbb50ec0c..b268c5cac 100644
--- a/src/components/mediaViewer/ZoomControls.scss
+++ b/src/components/mediaViewer/ZoomControls.scss
@@ -74,7 +74,7 @@
         width: .75rem;
         height: .75rem;
         border-radius: 50%;
-        background-color: #fff;
+        background-color: var(--color-white);
         right: 0;
         top: 50%;
         transform: translate(.325rem, -50%);
diff --git a/src/components/mediaViewer/helpers/formatFileSize.ts b/src/components/mediaViewer/helpers/formatFileSize.ts
index b353115db..a9199ad73 100644
--- a/src/components/mediaViewer/helpers/formatFileSize.ts
+++ b/src/components/mediaViewer/helpers/formatFileSize.ts
@@ -1,7 +1,7 @@
 const units = ['bytes', 'kB', 'MB', 'GB', 'TB', 'PB'];
 
 export default (bytes: number) => {
-  const number = Math.floor(Math.log(bytes) / Math.log(1024));
+  const number = bytes === 0 ? 0 : Math.floor(Math.log(bytes) / Math.log(1024));
 
   return `${(bytes / 1024 ** Math.floor(number)).toFixed(1)} ${units[number]}`;
 };
diff --git a/src/components/middle/MessageList.scss b/src/components/middle/MessageList.scss
index 0b7d3868a..b5bbfc65d 100644
--- a/src/components/middle/MessageList.scss
+++ b/src/components/middle/MessageList.scss
@@ -5,14 +5,17 @@
   overflow: scroll;
   overflow-x: hidden;
   overflow-y: overlay;
+  padding-bottom: .3125rem;
 
   body.hide-mask-shadow .mask-image-disabled &,
   .mask-image-enabled & {
     mask-image: linear-gradient(to top, transparent 0, #000 1rem);
   }
 
+  .custom-bg-color.mask-image-disabled &,
   .custom-bg-image.mask-image-disabled & {
-    margin-bottom: .3rem;
+    margin-bottom: .3125rem;
+    padding-bottom: 0;
   }
 
   @media (pointer: coarse) {
diff --git a/src/components/middle/MessageSelectToolbar.scss b/src/components/middle/MessageSelectToolbar.scss
index 823c7cd2b..607042e9f 100644
--- a/src/components/middle/MessageSelectToolbar.scss
+++ b/src/components/middle/MessageSelectToolbar.scss
@@ -77,9 +77,9 @@
     align-items: center;
     padding: 0.25rem;
 
-    background: white;
+    background: var(--color-background);
     border-radius: var(--border-radius-messages);
-    box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 1px 2px var(--color-default-shadow);
     font-weight: 500;
 
     @media (max-width: 600px) {
diff --git a/src/components/middle/MiddleColumn.scss b/src/components/middle/MiddleColumn.scss
index 7cddc8096..881f2929d 100644
--- a/src/components/middle/MiddleColumn.scss
+++ b/src/components/middle/MiddleColumn.scss
@@ -7,7 +7,8 @@
   overflow: hidden;
   z-index: -1;
 
-  &::before {
+  &::before,
+  &::after {
     content: "";
     display: block;
     position: absolute;
@@ -15,13 +16,18 @@
     left: 0;
     bottom: 0;
     right: 0;
-    background-color: rgb(230, 235, 238);
+    background-color: #F2EBCE;
+  }
+
+  &::after {
     background-image: url('../../assets/chat-bg.jpg');
     background-position: center;
     background-repeat: no-repeat;
     background-size: cover;
 
-    transition: background-image .3s ease;
+    .disable-animations #root & {
+      transition: opacity .2s !important;
+    }
 
     body.animation-level-0 & {
       transition: none;
@@ -32,19 +38,29 @@
     }
   }
 
-  .custom-bg-image > &::before {
+  .custom-bg-image > &::after {
     background-image: var(--custom-background) !important;
+    filter: blur(0);
+    transform: scale(1.1);
+  }
+
+  .custom-bg-color > &::before {
     background-color: var(--custom-background) !important;
     filter: blur(0);
     transform: scale(1.1);
   }
 
-  .custom-bg-image.blurred > &::before {
+  .custom-bg-image.blurred > &::after {
     filter: blur(12px);
   }
 
+  .custom-bg-color > &::after {
+    opacity: 0;
+  }
+
   @media screen and (min-width: 1276px) {
-    body.animation-level-2 &::before {
+    body.animation-level-2 &::before,
+    body.animation-level-2 &::after {
       margin: -16rem -5rem -20rem 0;
       overflow: hidden;
       transform: scale(1);
@@ -52,12 +68,12 @@
       transition: transform var(--layer-transition);
     }
 
-    body.animation-level-2 .custom-bg-image > &::before {
+    body.animation-level-2 .custom-bg-image > &::after {
       margin: -16rem -5rem -20rem -1rem;
-      transition: transform var(--layer-transition), background .3s ease;
+      transition: transform var(--layer-transition);
     }
 
-    body.animation-level-2 #Main.right-column-open :not(.custom-bg-image) > &::before {
+    body.animation-level-2 #Main.right-column-open :not(.custom-bg-image) > &::after {
       transform: scale(0.67);
     }
   }
@@ -101,10 +117,10 @@
       width: 100%;
       padding: 1rem;
       border-radius: var(--border-radius-messages);
-      background: white;
+      background: var(--color-background);
       color: var(--color-text-secondary);
       text-align: center;
-      box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+      box-shadow: 0 1px 2px var(--color-default-shadow);
     }
   }
 
@@ -312,6 +328,7 @@
     }
   }
 
+  .custom-bg-color &::before,
   .custom-bg-image &::before {
     display: none;
   }
@@ -330,7 +347,7 @@
     color: var(--color-black);
     height: 3.125rem;
     overflow: visible;
-    box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 1px 2px var(--color-default-shadow);
 
     &:hover {
       .icon-unpin {
diff --git a/src/components/middle/MiddleColumn.tsx b/src/components/middle/MiddleColumn.tsx
index 134fbd248..7b46b40af 100644
--- a/src/components/middle/MiddleColumn.tsx
+++ b/src/components/middle/MiddleColumn.tsx
@@ -59,6 +59,7 @@ type StateProps = {
   messageSendingRestrictionReason?: string;
   hasPinnedOrAudioMessage?: boolean;
   customBackground?: string;
+  isCustomBackgroundColor?: boolean;
   isRightColumnShown?: boolean;
   isBackgroundBlurred?: boolean;
   isMobileSearchActive?: boolean;
@@ -84,6 +85,7 @@ const MiddleColumn: FC<StateProps & DispatchProps> = ({
   messageSendingRestrictionReason,
   hasPinnedOrAudioMessage,
   customBackground,
+  isCustomBackgroundColor,
   isRightColumnShown,
   isBackgroundBlurred,
   isMobileSearchActive,
@@ -166,7 +168,8 @@ const MiddleColumn: FC<StateProps & DispatchProps> = ({
 
   const className = buildClassName(
     hasTools && 'has-header-tools',
-    customBackground && 'custom-bg-image',
+    customBackground && !isCustomBackgroundColor && 'custom-bg-image',
+    customBackground && isCustomBackgroundColor && 'custom-bg-color',
     customBackground && isBackgroundBlurred && 'blurred',
     MASK_IMAGE_ENABLED ? 'mask-image-enabled' : 'mask-image-disabled',
   );
@@ -293,12 +296,14 @@ export default memo(withGlobal(
   (global): StateProps => {
     const { isBackgroundBlurred, customBackground } = global.settings.byKey;
 
+    const isCustomBackgroundColor = Boolean((customBackground || '').match(/^#[a-f\d]{6,8}$/i));
     const currentMessageList = selectCurrentMessageList(global);
     const { chats: { listIds } } = global;
     if (!currentMessageList || !listIds.active) {
       return {
         customBackground,
         isBackgroundBlurred,
+        isCustomBackgroundColor,
       };
     }
 
@@ -320,6 +325,7 @@ export default memo(withGlobal(
       messageSendingRestrictionReason: chat && getMessageSendingRestrictionReason(chat),
       hasPinnedOrAudioMessage: Boolean(pinnedIds && pinnedIds.length) || Boolean(audioChatId && audioMessageId),
       customBackground,
+      isCustomBackgroundColor,
       isRightColumnShown: selectIsRightColumnShown(global),
       isBackgroundBlurred,
       isMobileSearchActive: Boolean(IS_MOBILE_SCREEN && selectCurrentTextSearch(global)),
diff --git a/src/components/middle/MiddleHeader.scss b/src/components/middle/MiddleHeader.scss
index b059ff6c8..a996e1547 100644
--- a/src/components/middle/MiddleHeader.scss
+++ b/src/components/middle/MiddleHeader.scss
@@ -9,7 +9,7 @@
     right: 0;
     height: 2.875rem;
     overflow: hidden;
-    box-shadow: 0 2px 2px rgba(114, 114, 114, 0.17);
+    box-shadow: 0 2px 2px var(--color-light-shadow);
 
     display: flex;
     flex-direction: row-reverse;
@@ -25,7 +25,7 @@
       left: 0;
       right: 0;
       height: 2px;
-      box-shadow: 0 2px 2px rgba(114, 114, 114, 0.17);
+      box-shadow: 0 2px 2px var(--color-light-shadow);
     }
 
     .HeaderPinnedMessage {
@@ -73,8 +73,8 @@
   display: flex;
   align-items: center;
   width: 100%;
-  box-shadow: 0 2px 2px rgba(114, 114, 114, 0.17);
-  background: #fff;
+  box-shadow: 0 2px 2px var(--color-light-shadow);
+  background: var(--color-background);
   padding: .5rem .8125rem .5rem 1.5rem;
   position: relative;
   z-index: var(--z-middle-header);
diff --git a/src/components/middle/MobileSearch.scss b/src/components/middle/MobileSearch.scss
index c26fae35f..205fb09e4 100644
--- a/src/components/middle/MobileSearch.scss
+++ b/src/components/middle/MobileSearch.scss
@@ -5,7 +5,7 @@
   z-index: var(--z-mobile-search);
   width: 100%;
   height: 3.5rem;
-  background: white;
+  background: var(--color-background);
   display: flex;
   align-items: center;
   padding: 0 0.5rem 0 0.25rem;
@@ -23,7 +23,7 @@
   z-index: var(--z-mobile-search);
   width: 100%;
   height: 3.5rem;
-  background: white;
+  background: var(--color-background);
   display: flex;
   align-items: center;
   padding-left: 1rem;
diff --git a/src/components/middle/ScrollDownButton.scss b/src/components/middle/ScrollDownButton.scss
index ef7d28b4a..375551b60 100644
--- a/src/components/middle/ScrollDownButton.scss
+++ b/src/components/middle/ScrollDownButton.scss
@@ -27,7 +27,7 @@
     align-items: center;
 
     > .Button {
-      box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+      box-shadow: 0 1px 2px var(--color-default-shadow);
 
       i {
         font-size: 1.75rem;
diff --git a/src/components/middle/composer/AttachmentModal.scss b/src/components/middle/composer/AttachmentModal.scss
index c395ac70a..b952891ca 100644
--- a/src/components/middle/composer/AttachmentModal.scss
+++ b/src/components/middle/composer/AttachmentModal.scss
@@ -66,7 +66,7 @@
     position: relative;
 
     .form-control {
-      background: white;
+      background: var(--color-background);
     }
 
     .MentionMenu {
diff --git a/src/components/middle/composer/BotKeyboardMenu.scss b/src/components/middle/composer/BotKeyboardMenu.scss
index a459fbe2e..000cbf8ac 100644
--- a/src/components/middle/composer/BotKeyboardMenu.scss
+++ b/src/components/middle/composer/BotKeyboardMenu.scss
@@ -32,7 +32,7 @@
       min-height: 3.0625rem;
       border-radius: var(--border-radius-messages-small);
       border: 2px solid var(--color-primary);
-      background: #fff;
+      background: var(--color-background);
       color: var(--color-primary);
       font-weight: 500;
       text-transform: none;
diff --git a/src/components/middle/composer/Composer.scss b/src/components/middle/composer/Composer.scss
index fc95ec6c2..b85805caf 100644
--- a/src/components/middle/composer/Composer.scss
+++ b/src/components/middle/composer/Composer.scss
@@ -150,10 +150,10 @@
 #message-compose {
   flex-grow: 1;
   max-width: calc(100% - 4rem);
-  background: white;
+  background: var(--color-background);
   border-radius: var(--border-radius-messages);
   border-bottom-right-radius: 0;
-  box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+  box-shadow: 0 1px 2px var(--color-default-shadow);
   position: relative;
   z-index: 1;
 
@@ -169,6 +169,10 @@
     background-image: url(data:image/svg+xml;base64,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);
     background-position: bottom left;
     transform: scaleX(-1);
+    
+    .theme-dark & {
+      background-image: url(data:image/svg+xml;base64,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);
+    }
   }
 
   @media (max-width: 600px) {
@@ -203,13 +207,13 @@
       position: absolute;
       top: .75rem;
       right: .75rem;
-      border: .1875rem solid #fff;
+      border: .1875rem solid var(--color-background);
       box-sizing: content-box;
       width: .5rem;
       height: .5rem;
       border-radius: 50%;
       background: var(--color-green-darker);
-      box-shadow: -.375rem -.25rem 0 -.1875rem #fff;
+      box-shadow: -.375rem -.25rem 0 -.1875rem var(--color-background);
       @media (max-width: 600px) {
         top: .5rem;
         right: .5rem;
diff --git a/src/components/middle/composer/DropTarget.scss b/src/components/middle/composer/DropTarget.scss
index 4700513be..4b682667f 100644
--- a/src/components/middle/composer/DropTarget.scss
+++ b/src/components/middle/composer/DropTarget.scss
@@ -1,6 +1,6 @@
 .DropTarget {
   border-radius: var(--border-radius-default);
-  background: #fff;
+  background: var(--color-background);
   padding: 1.25rem;
   flex: 1 1 auto;
   width: 100%;
@@ -10,7 +10,7 @@
   margin-bottom: .3125rem;
   display: flex;
   color: #A4ACB3;
-  box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+  box-shadow: 0 1px 2px var(--color-default-shadow);
 
   @media (max-height: 350px) {
     padding: .75rem;
diff --git a/src/components/middle/composer/EmojiPicker.scss b/src/components/middle/composer/EmojiPicker.scss
index 42a5c9581..a27946c20 100644
--- a/src/components/middle/composer/EmojiPicker.scss
+++ b/src/components/middle/composer/EmojiPicker.scss
@@ -17,7 +17,7 @@
     display: flex;
     align-items: center;
     justify-content: space-around;
-    box-shadow: 0 0 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 0 2px var(--color-default-shadow);
 
     @media (max-width: 600px) {
       overflow-x: auto;
diff --git a/src/components/middle/composer/EmojiTooltip.scss b/src/components/middle/composer/EmojiTooltip.scss
index 32ead605e..15314fe9b 100644
--- a/src/components/middle/composer/EmojiTooltip.scss
+++ b/src/components/middle/composer/EmojiTooltip.scss
@@ -3,7 +3,7 @@
   bottom: calc(100% + .5rem);
   left: 0;
   width: 100%;
-  background: white;
+  background: var(--color-background);
   border-radius: var(--border-radius-messages);
   padding: 0.5rem 0;
   max-height: 15rem;
@@ -15,7 +15,7 @@
   grid-auto-rows: auto;
   place-items: center;
 
-  box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+  box-shadow: 0 1px 2px var(--color-default-shadow);
 
   opacity: 0;
   transform: translateY(1.5rem);
diff --git a/src/components/middle/composer/MentionMenu.scss b/src/components/middle/composer/MentionMenu.scss
index 8e0299f5b..a96fa9c2b 100644
--- a/src/components/middle/composer/MentionMenu.scss
+++ b/src/components/middle/composer/MentionMenu.scss
@@ -4,14 +4,14 @@
   left: 0;
   width: calc(100% - 4rem);
   max-width: 20rem;
-  background: white;
+  background: var(--color-background);
   border-radius: var(--border-radius-messages);
   padding: 0.5rem 0;
   max-height: 15rem;
   overflow-x: hidden;
   overflow-y: auto;
 
-  box-shadow: 3px 3px 5px rgba(114, 114, 114, 0.25);
+  box-shadow: 3px 3px 5px var(--color-default-shadow);
   z-index: -1;
 
   opacity: 0;
diff --git a/src/components/middle/composer/StickerPicker.scss b/src/components/middle/composer/StickerPicker.scss
index fc5b964a6..06c04f856 100644
--- a/src/components/middle/composer/StickerPicker.scss
+++ b/src/components/middle/composer/StickerPicker.scss
@@ -19,7 +19,7 @@
     overflow-x: auto;
     overflow-y: hidden;
     white-space: nowrap;
-    box-shadow: 0 0 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 0 2px var(--color-default-shadow);
 
     scrollbar-width: none;
     scrollbar-color: rgba(0, 0, 0, 0);
diff --git a/src/components/middle/composer/SymbolMenu.scss b/src/components/middle/composer/SymbolMenu.scss
index 4d44f309e..6b0c8df20 100644
--- a/src/components/middle/composer/SymbolMenu.scss
+++ b/src/components/middle/composer/SymbolMenu.scss
@@ -32,7 +32,7 @@
     display: flex;
     align-items: center;
     justify-content: center;
-    box-shadow: 0 0 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 0 2px var(--color-default-shadow);
     position: relative;
 
     .Button {
diff --git a/src/components/middle/composer/TextFormatter.scss b/src/components/middle/composer/TextFormatter.scss
index a293f0bfa..1eddb5ec4 100644
--- a/src/components/middle/composer/TextFormatter.scss
+++ b/src/components/middle/composer/TextFormatter.scss
@@ -3,10 +3,10 @@
 
   &, &-link-control {
     position: absolute;
-    background: white;
+    background: var(--color-background);
     border-radius: var(--border-radius-messages);
     padding: 0.5rem 0.375rem;
-    box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 1px 2px var(--color-default-shadow);
   }
 
   &-link-control {
@@ -24,6 +24,8 @@
       border: none !important;
       outline: none !important;
       width: 100%;
+      color: var(--color-text);
+      background-color: var(--color-background);
     }
   }
 
@@ -62,12 +64,12 @@
 
     &::before {
       left: 0;
-      background: linear-gradient(to right, #fff .25rem, transparent 1rem)
+      background: linear-gradient(to right, var(--color-background) .25rem, transparent 1rem)
     }
 
     &::after {
       right: 0;
-      background: linear-gradient(to left, #fff .25rem, transparent 1rem)
+      background: linear-gradient(to left, var(--color-background) .25rem, transparent 1rem)
     }
 
     &.mask-left {
diff --git a/src/components/middle/message/CommentButton.scss b/src/components/middle/message/CommentButton.scss
index 521c9228e..32de3a4c0 100644
--- a/src/components/middle/message/CommentButton.scss
+++ b/src/components/middle/message/CommentButton.scss
@@ -1,6 +1,6 @@
 .CommentButton {
-  --background-color: #fff;
-  --hover-color: #f4f4f4;
+  --background-color: var(--color-background);
+  --hover-color: var(--color-chat-hover);
 
   display: flex;
   width: 100%;
@@ -30,9 +30,13 @@
     width: .5625rem;
     height: 1.25rem;
     background-position: bottom left;
-    background-image: url("data:image/svg+xml,%3Csvg width='9' height='20' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3E%3Cdefs%3E%3Cfilter x='-50%25' y='-14.7%25' width='200%25' height='141.2%25' filterUnits='objectBoundingBox' id='a'%3E%3CfeOffset dy='1' in='SourceAlpha' result='shadowOffsetOuter1'/%3E%3CfeGaussianBlur stdDeviation='1' in='shadowOffsetOuter1' result='shadowBlurOuter1'/%3E%3CfeColorMatrix values='0 0 0 0 0.0621962482 0 0 0 0 0.138574144 0 0 0 0 0.185037364 0 0 0 0.15 0' in='shadowBlurOuter1'/%3E%3C/filter%3E%3Cpath d='M3 17h6V0c-.193 2.84-.876 5.767-2.05 8.782-.904 2.325-2.446 4.485-4.625 6.48A1 1 0 003 17z' id='b'/%3E%3C/defs%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cuse fill='%23000' filter='url(%23a)' xlink:href='%23b'/%3E%3Cuse fill='%23f4f4f4' xlink:href='%23b'/%3E%3C/g%3E%3C/svg%3E");
+    background-image: url('data:image/svg+xml,%3Csvg width="9" height="20" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"%3E%3Cdefs%3E%3Cfilter x="-50%25" y="-14.7%25" width="200%25" height="141.2%25" filterUnits="objectBoundingBox" id="a"%3E%3CfeOffset dy="1" in="SourceAlpha" result="shadowOffsetOuter1"/%3E%3CfeGaussianBlur stdDeviation="1" in="shadowOffsetOuter1" result="shadowBlurOuter1"/%3E%3CfeColorMatrix values="0 0 0 0 0.0621962482 0 0 0 0 0.138574144 0 0 0 0 0.185037364 0 0 0 0.15 0" in="shadowBlurOuter1"/%3E%3C/filter%3E%3Cpath d="M3 17h6V0c-.193 2.84-.876 5.767-2.05 8.782-.904 2.325-2.446 4.485-4.625 6.48A1 1 0 003 17z" id="b"/%3E%3C/defs%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cuse fill="%23000" filter="url(%23a)" xlink:href="%23b"/%3E%3Cuse fill="%23FFF" xlink:href="%23b"/%3E%3C/g%3E%3C/svg%3E');
     opacity: 0;
-    transition: opacity .15s;
+    transition: opacity .15s, filter .15s;
+
+    .theme-dark #root & {
+      filter: invert(.83);
+    }
 
     body.animation-level-0 & {
       transition: none !important;
@@ -162,7 +166,7 @@
 
     .Avatar {
       transition: border .15s;
-      border: 2px solid #fff;
+      border: 2px solid var(--color-background);
       margin-right: 0;
       z-index: 3;
 
diff --git a/src/components/middle/message/Invoice.scss b/src/components/middle/message/Invoice.scss
index c13171265..2688232b4 100644
--- a/src/components/middle/message/Invoice.scss
+++ b/src/components/middle/message/Invoice.scss
@@ -16,7 +16,7 @@
           height: 10rem;
         }
       }
-  
+
       .description-text {
         position: absolute;
         top: 0;
@@ -24,10 +24,10 @@
         margin: .25rem;
         background-color: rgba(90, 110, 70, 0.6);
         border-radius: var(--border-radius-messages-small);
-        color: var(--color-white);
+        color: var(--color-text);
         font-weight: 500;
       }
     }
-    
+
   }
 }
diff --git a/src/components/middle/message/Message.scss b/src/components/middle/message/Message.scss
index 2b6ea8cb6..ef80285a6 100644
--- a/src/components/middle/message/Message.scss
+++ b/src/components/middle/message/Message.scss
@@ -5,7 +5,7 @@
   margin-bottom: 0.375rem;
   position: relative;
 
-  --background-color: white;
+  --background-color: var(--color-background);
   --hover-color: rgba(var(--color-text-secondary-rgb), 0.08);
   --active-color: rgba(var(--color-text-secondary-rgb), 0.16);
   --max-width: 29rem;
@@ -81,16 +81,19 @@
   &.own {
     flex-direction: row-reverse;
     --background-color: var(--color-background-own);
-    --hover-color: rgba(var(--color-text-green-rgb), 0.12);
-    --active-color: rgba(var(--color-text-green-rgb), 0.24);
+    --hover-color: var(--color-reply-own-hover);
+    --active-color: var(--color-reply-own-active);
     --max-width: 30rem;
-    --accent-color: var(--color-text-green);
+    --accent-color: var(--color-accent-own);
     --accent-shade-color: var(--color-green);
-    --secondary-color: var(--color-text-green);
+    --secondary-color: var(--color-accent-own);
     --color-code: var(--color-code-own);
     --color-code-bg: var(--color-code-own-bg);
+    --color-links: var(--color-own-links);
+    --color-links-hover: var(--color-own-links);
     --meta-safe-area-base: 3.5rem;
     --deleting-translate-x: 50%;
+    --color-text-green: var(--color-accent-own);
 
     @media (max-width: 600px) {
       padding-right: 0.25rem;
@@ -177,6 +180,15 @@
     bottom: 0.813rem;
   }
 
+  html.theme-dark &.own .Audio .ProgressSpinner {
+    background-image: url(data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTUiIGhlaWdodD0iMTUiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PHBhdGggZD0iTTguMjE4IDcuNWw1LjYzMy01LjYzM2EuNTA4LjUwOCAwIDEwLS43MTgtLjcxOEw3LjUgNi43ODIgMS44NjcgMS4xNDlhLjUwOC41MDggMCAxMC0uNzE4LjcxOEw2Ljc4MiA3LjVsLTUuNjMzIDUuNjMzYS41MDguNTA4IDAgMTAuNzE4LjcxOEw3LjUgOC4yMThsNS42MzMgNS42MzNhLjUwNi41MDYgMCAwMC43MTggMCAuNTA4LjUwOCAwIDAwMC0uNzE4TDguMjE4IDcuNXoiIGZpbGw9IiNGRkYiIGZpbGwtcnVsZT0ibm9uemVybyIgc3Ryb2tlPSIjQTQ1RDM3IiBzdHJva2UtbGluZWpvaW49InJvdW5kIi8+PC9zdmc+);
+
+    circle {
+      stroke: var(--background-color);
+    }
+  }
+
+
   .File {
     position: relative;
 
diff --git a/src/components/middle/message/MessageMeta.scss b/src/components/middle/message/MessageMeta.scss
index 626f78b81..b02e0f1f5 100644
--- a/src/components/middle/message/MessageMeta.scss
+++ b/src/components/middle/message/MessageMeta.scss
@@ -72,12 +72,15 @@
   }
 
   .Message.own .has-solid-background & {
-    color: var(--color-text-green);
+    color: var(--color-message-meta-own);
   }
 
   .MessageOutgoingStatus {
     margin-left: -.1875rem;
     font-size: 1.1875rem;
+    .Message.own & {
+      color: var(--color-accent-own);
+    }
   }
 
   .message-content.has-replies:not(.custom-shape) & {
diff --git a/src/components/middle/message/Poll.scss b/src/components/middle/message/Poll.scss
index 785bfa356..7ccbd9d1d 100644
--- a/src/components/middle/message/Poll.scss
+++ b/src/components/middle/message/Poll.scss
@@ -109,7 +109,7 @@
     margin-top: -2px;
 
     .Avatar {
-      border: 1px solid #fff;
+      border: 1px solid var(--color-white);
       margin-right: 0;
       box-sizing: content-box;
 
diff --git a/src/components/middle/message/PollOption.scss b/src/components/middle/message/PollOption.scss
index 9cb991b46..9f45c8129 100644
--- a/src/components/middle/message/PollOption.scss
+++ b/src/components/middle/message/PollOption.scss
@@ -35,7 +35,7 @@
     width: 1rem;
     height: 1rem;
     background: var(--accent-color);
-    color: #fff;
+    color: var(--background-color);
     border-radius: .5rem;
     font-size: .75rem;
     text-align: center;
diff --git a/src/components/middle/message/_message-content.scss b/src/components/middle/message/_message-content.scss
index 7d6315f83..dca2290e8 100644
--- a/src/components/middle/message/_message-content.scss
+++ b/src/components/middle/message/_message-content.scss
@@ -98,7 +98,7 @@
   }
 
   &.has-shadow {
-    box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 1px 2px var(--color-default-shadow);
   }
 
   &.has-solid-background, .is-album & {
@@ -123,6 +123,10 @@
         background-position: bottom right;
         background-image: url('data:image/svg+xml,%3Csvg width="9" height="20" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"%3E%3Cdefs%3E%3Cfilter x="-50%25" y="-14.7%25" width="200%25" height="141.2%25" filterUnits="objectBoundingBox" id="a"%3E%3CfeOffset dy="1" in="SourceAlpha" result="shadowOffsetOuter1"/%3E%3CfeGaussianBlur stdDeviation="1" in="shadowOffsetOuter1" result="shadowBlurOuter1"/%3E%3CfeColorMatrix values="0 0 0 0 0.0621962482 0 0 0 0 0.138574144 0 0 0 0 0.185037364 0 0 0 0.15 0" in="shadowBlurOuter1"/%3E%3C/filter%3E%3Cpath d="M6 17H0V0c.193 2.84.876 5.767 2.05 8.782.904 2.325 2.446 4.485 4.625 6.48A1 1 0 016 17z" id="b"/%3E%3C/defs%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cuse fill="%23000" filter="url(%23a)" xlink:href="%23b"/%3E%3Cuse fill="%23EEFFDE" xlink:href="%23b"/%3E%3C/g%3E%3C/svg%3E');
       }
+
+      .theme-dark &:not([data-has-custom-appendix])::before {
+        background-image: url(data:image/svg+xml;base64,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);
+      }
     }
 
     .Message:not(.own) & {
@@ -131,6 +135,10 @@
         background-position: bottom left;
         background-image: url('data:image/svg+xml,%3Csvg width="9" height="20" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"%3E%3Cdefs%3E%3Cfilter x="-50%25" y="-14.7%25" width="200%25" height="141.2%25" filterUnits="objectBoundingBox" id="a"%3E%3CfeOffset dy="1" in="SourceAlpha" result="shadowOffsetOuter1"/%3E%3CfeGaussianBlur stdDeviation="1" in="shadowOffsetOuter1" result="shadowBlurOuter1"/%3E%3CfeColorMatrix values="0 0 0 0 0.0621962482 0 0 0 0 0.138574144 0 0 0 0 0.185037364 0 0 0 0.15 0" in="shadowBlurOuter1"/%3E%3C/filter%3E%3Cpath d="M3 17h6V0c-.193 2.84-.876 5.767-2.05 8.782-.904 2.325-2.446 4.485-4.625 6.48A1 1 0 003 17z" id="b"/%3E%3C/defs%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cuse fill="%23000" filter="url(%23a)" xlink:href="%23b"/%3E%3Cuse fill="%23FFF" xlink:href="%23b"/%3E%3C/g%3E%3C/svg%3E');
       }
+
+      .theme-dark &:not([data-has-custom-appendix])::before {
+        background-image: url(data:image/svg+xml;base64,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);
+      }
     }
 
     &:not(.has-solid-background) {
diff --git a/src/components/payment/PaymentModal.scss b/src/components/payment/PaymentModal.scss
index 29ba22ce2..0677777b0 100644
--- a/src/components/payment/PaymentModal.scss
+++ b/src/components/payment/PaymentModal.scss
@@ -12,7 +12,7 @@
     display: flex;
     align-items: center;
     flex-direction: row;
-    background: white;
+    background: var(--color-background);
     border-bottom: 1px var(--color-borders) solid;
 
     h3 {
@@ -51,7 +51,7 @@
     border-bottom-right-radius: 10px;
     width: 100%;
     padding: .75rem 1rem;
-    background: white;
+    background: var(--color-background);
     border-top: 1px var(--color-borders) solid;
 
     button {
diff --git a/src/components/right/PollAnswerResults.scss b/src/components/right/PollAnswerResults.scss
index 958e7acc6..96371691d 100644
--- a/src/components/right/PollAnswerResults.scss
+++ b/src/components/right/PollAnswerResults.scss
@@ -14,7 +14,7 @@
     padding: 1rem .75rem .5rem 1rem;
     position: sticky;
     top: 0;
-    background: #fff;
+    background: var(--color-background);
 
     @media (max-width: 600px) {
       padding: .5rem .25rem .5rem .5rem;
diff --git a/src/components/right/Profile.scss b/src/components/right/Profile.scss
index b44ac9b42..3a33cf147 100644
--- a/src/components/right/Profile.scss
+++ b/src/components/right/Profile.scss
@@ -51,7 +51,7 @@
   flex-direction: column-reverse;
 
   .TabList {
-    background: #fff;
+    background: var(--color-background);
     top: -1px;
     .Tab {
       padding: .6875rem .25rem;
diff --git a/src/components/right/RightColumn.scss b/src/components/right/RightColumn.scss
index b8fd8bdee..93c07a851 100644
--- a/src/components/right/RightColumn.scss
+++ b/src/components/right/RightColumn.scss
@@ -23,7 +23,7 @@
   }
 
   @media (max-width: 1275px) {
-    box-shadow: 0 .25rem .5rem .1rem rgba(114, 114, 114, 0.25);
+    box-shadow: 0 .25rem .5rem .1rem var(--color-default-shadow);
   }
 
   @media (max-width: 600px) {
diff --git a/src/components/ui/AvatarEditable.scss b/src/components/ui/AvatarEditable.scss
index a7b5a1d07..c4ed3a652 100644
--- a/src/components/ui/AvatarEditable.scss
+++ b/src/components/ui/AvatarEditable.scss
@@ -55,7 +55,7 @@
     }
 
     &.filled {
-      background-color: white;
+      background-color: var(--color-background);
 
       &::after {
         content: '';
diff --git a/src/components/ui/Checkbox.scss b/src/components/ui/Checkbox.scss
index 9a88bf122..1f88a3172 100644
--- a/src/components/ui/Checkbox.scss
+++ b/src/components/ui/Checkbox.scss
@@ -79,7 +79,7 @@
     &::before {
       border: 2px solid var(--color-borders);
       border-radius: .25rem;
-      background-color: white;
+      background-color: var(--color-white);
       transition: border-color .1s ease;
     }
 
diff --git a/src/components/ui/CropModal.scss b/src/components/ui/CropModal.scss
index 03689c537..b9835fd2f 100644
--- a/src/components/ui/CropModal.scss
+++ b/src/components/ui/CropModal.scss
@@ -26,7 +26,7 @@
     position: absolute;
     bottom: 1rem;
     right: 1rem;
-    box-shadow: 0 1px 2px rgba(114, 114, 114, 0.25);
+    box-shadow: 0 1px 2px var(--color-default-shadow);
   }
 
   #avatar-crop {
diff --git a/src/components/ui/Menu.scss b/src/components/ui/Menu.scss
index a0e7308d2..d91aa7f87 100644
--- a/src/components/ui/Menu.scss
+++ b/src/components/ui/Menu.scss
@@ -19,8 +19,8 @@
     padding: 0.5rem 0;
     margin: 0;
     position: absolute;
-    background-color: white;
-    box-shadow: 0 .25rem .5rem .1rem rgba(114, 114, 114, 0.25);
+    background-color: var(--color-background);
+    box-shadow: 0 .25rem .5rem .1rem var(--color-default-shadow);
     border-radius: var(--border-radius-default);
     min-width: 13.5rem;
     z-index: var(--z-menu-bubble);
diff --git a/src/components/ui/MenuItem.scss b/src/components/ui/MenuItem.scss
index 37a22df63..a11141138 100644
--- a/src/components/ui/MenuItem.scss
+++ b/src/components/ui/MenuItem.scss
@@ -24,6 +24,10 @@
     color: var(--color-text-secondary);
   }
 
+  .menu-item-name {
+    margin-right: 2rem;
+  }
+
   &.disabled {
     opacity: 0.5 !important;
     cursor: default !important;
@@ -41,4 +45,8 @@
     background-color: var(--color-chat-active);
     transition: none !important;
   }
+
+  & > .Switcher {
+    margin-left: auto;
+  }
 }
diff --git a/src/components/ui/Modal.scss b/src/components/ui/Modal.scss
index fde311faf..74dfd7270 100644
--- a/src/components/ui/Modal.scss
+++ b/src/components/ui/Modal.scss
@@ -47,8 +47,8 @@
     max-width: 35rem;
     min-width: 17.5rem;
     margin: 2rem auto;
-    background-color: white;
-    box-shadow: 0 .25rem .5rem .1rem rgba(114, 114, 114, 0.25);
+    background-color: var(--color-background);
+    box-shadow: 0 .25rem .5rem .1rem var(--color-default-shadow);
     border-radius: var(--border-radius-default);
     transform: translate3d(0, -1rem, 0);
 
diff --git a/src/components/ui/Radio.scss b/src/components/ui/Radio.scss
index 4f0e11622..f6daa18ac 100644
--- a/src/components/ui/Radio.scss
+++ b/src/components/ui/Radio.scss
@@ -42,7 +42,7 @@
     &::before {
       border: 2px solid var(--color-borders);
       border-radius: 50%;
-      background-color: white;
+      background-color: var(--color-white);
       opacity: 1;
       transition: border-color .1s ease, opacity .1s ease;
     }
diff --git a/src/components/ui/SearchInput.scss b/src/components/ui/SearchInput.scss
index fd5bc29f2..6b81a769a 100644
--- a/src/components/ui/SearchInput.scss
+++ b/src/components/ui/SearchInput.scss
@@ -22,7 +22,7 @@
   &.has-focus {
     border-color: var(--color-primary);
     caret-color: var(--color-primary);
-    background-color: #fff;
+    background-color: var(--color-background);
 
     input {
       & + i {
diff --git a/src/components/ui/Switcher.scss b/src/components/ui/Switcher.scss
new file mode 100644
index 000000000..a0b9a0591
--- /dev/null
+++ b/src/components/ui/Switcher.scss
@@ -0,0 +1,53 @@
+.Switcher {
+  display: inline-flex;
+  align-items: center;
+  position: relative;
+  margin: 0;
+
+  &.disabled {
+    pointer-events: none;
+    opacity: 0.5;
+  }
+
+  input {
+    height: 0;
+    width: 0;
+    visibility: hidden;
+    position: absolute;
+    z-index: var(--z-below);
+    opacity: 0;
+  }
+
+  .widget {
+    cursor: pointer;
+    text-indent: -999px;
+    width: 2.125rem;
+    height: 0.875rem;
+    background: var(--color-gray);
+    display: inline-block;
+    border-radius: .5rem;
+    position: relative;
+  }
+
+  .widget:after {
+    content: '';
+    position: absolute;
+    top: -.125rem;
+    left: 0;
+    width: 1.125rem;
+    height: 1.125rem;
+    background: var(--color-background);
+    border-radius: .75rem;
+    border: .125rem solid var(--color-gray);
+  }
+
+  input:checked + .widget {
+    background: var(--color-primary);
+  }
+
+  input:checked + .widget:after {
+    left: calc(100% - 1.125rem);
+    transform: translateX(calc(-100% + 1.125rem));
+    border-color: var(--color-primary);
+  }
+}
diff --git a/src/components/ui/Switcher.tsx b/src/components/ui/Switcher.tsx
new file mode 100644
index 000000000..705748cea
--- /dev/null
+++ b/src/components/ui/Switcher.tsx
@@ -0,0 +1,60 @@
+import { ChangeEvent } from 'react';
+import React, { FC, memo, useCallback } from '../../lib/teact/teact';
+
+import buildClassName from '../../util/buildClassName';
+
+import './Switcher.scss';
+
+type OwnProps = {
+  id?: string;
+  name?: string;
+  value?: string;
+  label: string;
+  checked?: boolean;
+  disabled?: boolean;
+  onChange?: (e: ChangeEvent<HTMLInputElement>) => void;
+  onCheck?: (isChecked: boolean) => void;
+};
+
+const Switcher: FC<OwnProps> = ({
+  id,
+  name,
+  value,
+  label,
+  checked = false,
+  disabled,
+  onChange,
+  onCheck,
+}) => {
+  const handleChange = useCallback((event: ChangeEvent<HTMLInputElement>) => {
+    if (onChange) {
+      onChange(event);
+    }
+
+    if (onCheck) {
+      onCheck(event.currentTarget.checked);
+    }
+  }, [onChange, onCheck]);
+
+  const className = buildClassName(
+    'Switcher',
+    disabled && 'disabled',
+  );
+
+  return (
+    <label className={className} title={label}>
+      <input
+        type="checkbox"
+        id={id}
+        name={name}
+        value={value}
+        checked={checked}
+        disabled={disabled}
+        onChange={handleChange}
+      />
+      <span className="widget" />
+    </label>
+  );
+};
+
+export default memo(Switcher);
diff --git a/src/components/ui/TabList.scss b/src/components/ui/TabList.scss
index 313c565c6..73db6fa4d 100644
--- a/src/components/ui/TabList.scss
+++ b/src/components/ui/TabList.scss
@@ -7,8 +7,8 @@
   align-items: flex-end;
   font-size: 0.875rem;
   flex-wrap: nowrap;
-  box-shadow: 0 2px 2px rgba(114, 114, 114, 0.17);
-  background-color: white;
+  box-shadow: 0 2px 2px var(--color-light-shadow);
+  background-color: var(--color-background);
   overflow-x: auto;
   overflow-y: hidden;
 
diff --git a/src/components/ui/Transition.scss b/src/components/ui/Transition.scss
index 33af30b12..3b1f03e14 100644
--- a/src/components/ui/Transition.scss
+++ b/src/components/ui/Transition.scss
@@ -5,6 +5,7 @@
     width: 100%;
     height: 100%;
     animation-fill-mode: forwards !important;
+    transition: background-color .2s;
 
     &.from, &.to {
       position: absolute;
@@ -245,7 +246,7 @@
    */
 
   &.slide-layers {
-    --background-color: var(--color-white);
+    --background-color: var(--color-background);
     background: black;
 
     > div {
@@ -290,7 +291,7 @@
 
   &.push-slide {
     > div {
-      background: white;
+      background: var(--color-background);
     }
 
     > .from {
diff --git a/src/global/initial.ts b/src/global/initial.ts
index d9f1d358f..93e1916ed 100644
--- a/src/global/initial.ts
+++ b/src/global/initial.ts
@@ -103,6 +103,7 @@ export const INITIAL_STATE: GlobalState = {
       isBackgroundBlurred: true,
       animationLevel: ANIMATION_LEVEL_DEFAULT,
       messageSendKeyCombo: 'enter',
+      theme: 'light',
       shouldAutoDownloadMediaFromContacts: true,
       shouldAutoDownloadMediaInPrivateChats: true,
       shouldAutoDownloadMediaInGroups: true,
diff --git a/src/modules/actions/ui/initial.ts b/src/modules/actions/ui/initial.ts
index 882a7f619..030ec893d 100644
--- a/src/modules/actions/ui/initial.ts
+++ b/src/modules/actions/ui/initial.ts
@@ -4,15 +4,20 @@ import {
   IS_ANDROID, IS_IOS, IS_SAFARI, IS_TOUCH_ENV,
 } from '../../../util/environment';
 import { setLanguage } from '../../../util/langProvider';
+import switchTheme from '../../../util/switchTheme';
 
 addReducer('init', (global) => {
-  const { animationLevel, messageTextSize, language } = global.settings.byKey;
+  const {
+    theme, animationLevel, messageTextSize, language,
+  } = global.settings.byKey;
 
   setLanguage(language);
 
   document.documentElement.style.setProperty('--message-text-size', `${messageTextSize}px`);
+  document.body.classList.add('initial');
   document.body.classList.add(`animation-level-${animationLevel}`);
   document.body.classList.add(IS_TOUCH_ENV ? 'is-touch-env' : 'is-pointer-env');
+  switchTheme(theme, animationLevel > 0);
 
   if (IS_SAFARI) {
     document.body.classList.add('is-safari');
@@ -27,6 +32,10 @@ addReducer('init', (global) => {
 addReducer('setIsUiReady', (global, actions, payload) => {
   const { uiReadyState } = payload!;
 
+  if (uiReadyState === 2) {
+    document.body.classList.remove('initial');
+  }
+
   return {
     ...global,
     uiReadyState,
diff --git a/src/styles/_forms.scss b/src/styles/_forms.scss
index d5ca35059..c35d0235d 100644
--- a/src/styles/_forms.scss
+++ b/src/styles/_forms.scss
@@ -70,9 +70,10 @@
   width: 100%;
   height: 3.375rem;
   padding: calc(0.75rem - var(--border-width)) calc(.9rem - var(--border-width));
-  border: var(--border-width) solid var(--color-borders);
+  border: var(--border-width) solid var(--color-borders-input);
   border-radius: var(--border-radius-default);
   color: var(--color-text);
+  background-color: var(--color-background);
   outline: none;
   transition: border-color 0.15s ease;
   word-break: break-word;
@@ -82,7 +83,11 @@
   line-height: 1.25rem;
 
   &:hover {
-    border-color: var(--color-gray);
+    border-color: var(--color-primary);
+
+    & + label {
+      color: var(--color-primary);
+    }
   }
 
   &:focus,
diff --git a/src/styles/_variables.scss b/src/styles/_variables.scss
index 2e805f692..1ec066c92 100644
--- a/src/styles/_variables.scss
+++ b/src/styles/_variables.scss
@@ -64,9 +64,11 @@ $color-user-8: #faa774;
   --color-text-secondary-rgb: #{toRGB($color-text-secondary)};
   --color-text-meta: #{$color-text-meta};
   --color-text-meta-rgb: #{toRGB($color-text-meta)};
+  --color-text-meta-colored: #{$color-text-green};
   --color-text-green: #{$color-text-green};
   --color-text-green-rgb: #{toRGB($color-text-green)};
   --color-borders: #{$color-borders};
+  --color-borders-input: #{$color-borders};
   --color-webpage-initial-background: #{$color-dark-gray};
   --color-interactive-active: var(--color-primary);
   --color-interactive-inactive: rgba(var(--color-text-secondary-rgb), 0.25);
@@ -94,6 +96,8 @@ $color-user-8: #faa774;
   --color-links-darker: #{darken($color-links, 15%)};
   --color-links-darker-hover: #{darken($color-links, 23%)};
 
+  --color-own-links: #{$color-white};
+
   --color-placeholders: #{$color-placeholders};
 
   --color-code: #4a729a;
@@ -101,6 +105,9 @@ $color-user-8: #faa774;
   --color-code-own: #3c7940;
   --color-code-own-bg: #{rgba($color-text-secondary, .08)};
 
+  --color-accent-own: #{$color-text-green};
+  --color-message-meta-own: #{$color-text-green};
+
   --color-reply-hover: #{blend-normal(rgba($color-text-secondary, 0.08), $color-white)};
   --color-reply-active: #{blend-normal(rgba($color-text-secondary, 0.16), $color-white)};
   --color-reply-own-hover: #{blend-normal(rgba($color-text-green, 0.12), $color-light-green)};
@@ -123,6 +130,9 @@ $color-user-8: #faa774;
   --color-user-7: #{$color-user-7};
   --color-user-8: #{$color-user-8};
 
+  --color-default-shadow: #72727240;
+  --color-light-shadow: #7272722B;
+
   --border-radius-default: 0.75rem;
   --border-radius-default-small: 0.625rem;
   --border-radius-default-tiny: 0.375rem;
diff --git a/src/styles/index.scss b/src/styles/index.scss
index 71f8cd05e..b027840f2 100644
--- a/src/styles/index.scss
+++ b/src/styles/index.scss
@@ -83,6 +83,10 @@ body.cursor-grabbing, body.cursor-grabbing * {
   box-sizing: border-box;
 }
 
+.disable-animations #root * {
+  transition: none !important;
+}
+
 .custom-scroll,
 .custom-scroll-x {
   scrollbar-width: thin;
diff --git a/src/styles/themes.json b/src/styles/themes.json
new file mode 100644
index 000000000..6ab3e67b6
--- /dev/null
+++ b/src/styles/themes.json
@@ -0,0 +1,23 @@
+{
+  "--color-primary": ["#50A2E9", "#868DF5"],
+  "--color-background": ["#FFFFFF", "#212121"],
+  "--color-background-own": ["#EEFEDF", "#A45D37"],
+  "--color-chat-hover": ["#F4F4F5", "#2C2C2C"],
+  "--color-chat-active": ["#ededed", "#292929"],
+  "--color-text": ["#000000", "#FFFFFF"],
+  "--color-text-secondary": ["#707579", "#AAAAAA"],
+  "--color-borders": ["#DADCE0", "#100F10"],
+  "--color-borders-input": ["#DADCE0", "#5B5B5A"],
+  "--color-links": ["#52A1EF", "#868DF6"],
+  "--color-gray": ["#C4C9CC", "#808080"],
+  "--color-default-shadow": ["#72727240", "#00000099"],
+  "--color-light-shadow": ["#7272722B", "#00000040"],
+  "--color-green": ["#4DCD5E", "#868DF5"],
+  "--color-text-meta-colored": ["#4DCD5E", "#868DF5"],
+  "--color-reply-own-hover": ["#DBF4CE", "#A26947"],
+  "--color-reply-own-active": ["#C8EBBC", "#B0714C"],
+  "--color-accent-own": ["#4FAE4E", "#FFFFFF"],
+  "--color-message-meta-own": ["#4FAE4E", "#D9BDAD"],
+  "--color-own-links": ["#52A1EF", "#FFFFFF"],
+  "--color-code-own": ["#3C7940", "#FFFFFF"]
+}
diff --git a/src/types/index.ts b/src/types/index.ts
index 803a00131..9f8ce25c8 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -26,6 +26,7 @@ export interface ISettings extends Record<string, any> {
   isBackgroundBlurred?: boolean;
   animationLevel: 0 | 1 | 2;
   messageSendKeyCombo: 'enter' | 'ctrl-enter';
+  theme: 'light' | 'dark';
   shouldAutoDownloadMediaFromContacts: boolean;
   shouldAutoDownloadMediaInPrivateChats: boolean;
   shouldAutoDownloadMediaInGroups: boolean;
diff --git a/src/util/switchTheme.ts b/src/util/switchTheme.ts
new file mode 100644
index 000000000..3090fc20b
--- /dev/null
+++ b/src/util/switchTheme.ts
@@ -0,0 +1,85 @@
+import { ISettings } from '../types';
+
+import { animateSingle } from './animation';
+
+import themeColors from '../styles/themes.json';
+
+type RGBAColor = {
+  r: number;
+  g: number;
+  b: number;
+  a?: number;
+};
+
+let isInitialized = false;
+
+const HEX_COLOR_REGEX = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})?$/i;
+const DURATION_MS = 200;
+const ENABLE_ANIMATION_DELAY_MS = 500;
+
+const lerp = (start: number, end: number, interpolationRatio: number) => {
+  return (1 - interpolationRatio) * start + interpolationRatio * end;
+};
+
+const colors = (Object.keys(themeColors) as Array<keyof typeof themeColors>).map((property) => ({
+  property,
+  colors: [hexToRgb(themeColors[property][0]), hexToRgb(themeColors[property][1])],
+}));
+
+export default (theme: ISettings['theme'], withAnimation: boolean) => {
+  const shouldAnimate = isInitialized && withAnimation;
+  const startIndex = theme === 'dark' ? 0 : 1;
+  const endIndex = theme === 'dark' ? 1 : 0;
+  const startAt = Date.now();
+
+  document.documentElement.classList.remove(`theme-${theme === 'dark' ? 'light' : 'dark'}`);
+  if (isInitialized) {
+    document.documentElement.classList.add('disable-animations');
+  }
+  document.documentElement.classList.add(`theme-${theme}`);
+
+  setTimeout(() => {
+    document.documentElement.classList.remove('disable-animations');
+  }, ENABLE_ANIMATION_DELAY_MS);
+
+  isInitialized = true;
+
+  if (shouldAnimate) {
+    animateSingle(() => {
+      const t = Math.min((Date.now() - startAt) / DURATION_MS, 1);
+
+      applyColorAnimationStep(startIndex, endIndex, transition(t));
+
+      return t < 1;
+    });
+  } else {
+    applyColorAnimationStep(startIndex, endIndex);
+  }
+};
+
+function transition(t: number) {
+  return 1 - ((1 - t) ** 3.5);
+}
+
+function hexToRgb(hex: string): RGBAColor {
+  const result = HEX_COLOR_REGEX.exec(hex)!;
+
+  return {
+    r: parseInt(result[1], 16),
+    g: parseInt(result[2], 16),
+    b: parseInt(result[3], 16),
+    a: result[4] ? parseInt(result[4], 16) : undefined,
+  };
+}
+
+function applyColorAnimationStep(startIndex: number, endIndex: number, interpolationRatio: number = 1) {
+  colors.forEach(({ property, colors: propertyColors }) => {
+    const r = Math.round(lerp(propertyColors[startIndex].r, propertyColors[endIndex].r, interpolationRatio));
+    const g = Math.round(lerp(propertyColors[startIndex].g, propertyColors[endIndex].g, interpolationRatio));
+    const b = Math.round(lerp(propertyColors[startIndex].b, propertyColors[endIndex].b, interpolationRatio));
+    const a = propertyColors[startIndex].a
+      && Math.round(lerp(propertyColors[startIndex].a!, propertyColors[endIndex].a!, interpolationRatio));
+
+    document.documentElement.style.setProperty(property, a ? `rgba(${r},${g},${b},${a / 255})` : `rgb(${r},${g},${b})`);
+  });
+}