diff --git a/dist/index.css b/dist/index.css
index d9f1ec27..e494400f 100644
--- a/dist/index.css
+++ b/dist/index.css
@@ -57,22 +57,20 @@ main {
       var(--color-2) 30%,
       transparent 35%);
 }
-@media (prefers-color-scheme: dark) {
-  #background-wrapper {
-    opacity: 0.5;
-  }
-  #background-wrapper #sky {
-    --color-1: hsl(188, 100%, 30%);
-    --color-2: hsl(194, 72%, 24%);
-  }
-  #background-wrapper #grass-1 {
-    --color-1: hsl(120, 30%, 30%);
-    --color-2: hsl(120, 30%, 24%);
-  }
-  #background-wrapper #grass-2 {
-    --color-1: hsl(110, 60%, 30%);
-    --color-2: hsl(110, 50%, 24%);
-  }
+body[theme=dark] #background-wrapper {
+  opacity: 0.5;
+}
+body[theme=dark] #background-wrapper #sky {
+  --color-1: hsl(188, 100%, 30%);
+  --color-2: hsl(194, 72%, 24%);
+}
+body[theme=dark] #background-wrapper #grass-1 {
+  --color-1: hsl(120, 30%, 30%);
+  --color-2: hsl(120, 30%, 24%);
+}
+body[theme=dark] #background-wrapper #grass-2 {
+  --color-1: hsl(110, 60%, 30%);
+  --color-2: hsl(110, 50%, 24%);
 }
 
 /* src/colors.css */
@@ -86,14 +84,12 @@ main {
   --surface-hover: hsla(var(--hue), 100%, 5%, 10%);
   --surface-active: hsla(var(--hue), 100%, 5%, 15%);
 }
-@media (prefers-color-scheme: dark) {
-  [color]:not([color=standard]) {
-    --accent-luma: var(--accent-luma-dark);
-    --accent-text-luma: var(--accent-text-luma-dark);
-    --surface: hsla(var(--hue), 100%, 95%, 5%);
-    --surface-hover: hsla(var(--hue), 100%, 95%, 10%);
-    --surface-active: hsla(var(--hue), 100%, 95%, 15%);
-  }
+body[theme=dark] [color]:not([color=standard]) {
+  --accent-luma: var(--accent-luma-dark);
+  --accent-text-luma: var(--accent-text-luma-dark);
+  --surface: hsla(var(--hue), 100%, 95%, 5%);
+  --surface-hover: hsla(var(--hue), 100%, 95%, 10%);
+  --surface-active: hsla(var(--hue), 100%, 95%, 15%);
 }
 [color]:not([color=standard]).tile {
   --gradient-luma-1: 70%;
@@ -111,14 +107,12 @@ main {
   --surface-active: hsl(var(--hue), 100%, var(--active-luma));
   --text-normal: hsl(var(--hue), 100%, var(--text-luma));
 }
-@media (prefers-color-scheme: dark) {
-  [color]:not([color=standard]).tile {
-    --gradient-luma-1: 20%;
-    --gradient-luma-2: 15%;
-    --hover-luma: 25%;
-    --active-luma: 30%;
-    --text-luma: 90%;
-  }
+body[theme=dark] [color]:not([color=standard]).tile {
+  --gradient-luma-1: 20%;
+  --gradient-luma-2: 15%;
+  --hover-luma: 25%;
+  --active-luma: 30%;
+  --text-luma: 90%;
 }
 [color]:not([color=standard]).fill-color {
   color: white;
@@ -133,11 +127,9 @@ main {
     --sat: 100%;
     background: hsl(var(--hue), var(--sat), var(--luma), 40%);
   }
-  @media (prefers-color-scheme: dark) {
-    [color]:not([color=standard]).background {
-      --luma: var(--background-luma-dark);
-      --sat: 100%;
-    }
+  body[theme=dark] [color]:not([color=standard]).background {
+    --luma: var(--background-luma-dark);
+    --sat: 100%;
   }
   [color=standard].background {
     background: var(--surface);
@@ -147,14 +139,12 @@ main {
   --luma: var(--subtle-luma);
   background: hsl(var(--hue), 100%, var(--luma), 50%);
 }
-@media (prefers-color-scheme: dark) {
+body[theme=dark] [color]:not([color=standard]).subtle-background {
+  --luma: var(--subtle-luma-dark);
+}
+@media (display-mode: standalone) {
   [color]:not([color=standard]).subtle-background {
-    --luma: var(--subtle-luma-dark);
-  }
-  @media (display-mode: standalone) {
-    [color]:not([color=standard]).subtle-background {
-      --luma: 0%;
-    }
+    --luma: 0%;
   }
 }
 [color=coral] {
diff --git a/dist/index.html b/dist/index.html
index 83f9f461..49ace0c2 100644
--- a/dist/index.html
+++ b/dist/index.html
@@ -9,10 +9,7 @@
             content="width=device-width, initial-scale=1.0, viewport-fit=cover, user-scalable=no"
         />
 
-        <meta
-            name="theme-color"
-            content="black"
-        />
+        <meta name="theme-color" content="black" />
 
         <link rel="stylesheet" href="styles.css" />
         <link rel="stylesheet" href="index.css" />
diff --git a/dist/index.js b/dist/index.js
index 09459e86..e5331ec8 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -620,7 +620,8 @@
     settingsModel: {
       username: ["user-name"],
       firstDayOfWeek: ["first-day-of-week"],
-      language: ["language"]
+      language: ["language"],
+      theme: ["theme"]
     }
   };
 
@@ -5060,6 +5061,11 @@
         regional: "Language & Region",
         info: "About Comms"
       },
+      themes: {
+        dark: "Dark",
+        light: "Light",
+        system: "Device theme"
+      },
       version: "Version",
       language: "Language",
       firstDayOfWeekLabel: "First day of week"
@@ -5265,6 +5271,11 @@
           regional: "Sprache & Region",
           info: "\xDCber Comms"
         },
+        themes: {
+          dark: "Dunkel",
+          light: "Hell",
+          system: "Ger\xE4teeinstellung"
+        },
         version: "Version",
         language: "Sprache",
         firstDayOfWeekLabel: "Erster Wochentag"
@@ -5453,6 +5464,11 @@
           regional: "Idioma y Regi\xF3n",
           info: "Sobre Comms"
         },
+        themes: {
+          dark: "Oscuro",
+          light: "Claro",
+          system: "Seg\xFAn dispositivo"
+        },
         version: "Versi\xF3n",
         language: "Idioma",
         firstDayOfWeekLabel: "Primer d\xEDa de la semana"
@@ -5585,12 +5601,6 @@
     de: "Deutsch",
     es: "Espa\xF1ol"
   };
-  var Languages = /* @__PURE__ */ ((Languages2) => {
-    Languages2["English"] = "en";
-    Languages2["German"] = "de";
-    Languages2["Spanish"] = "es";
-    return Languages2;
-  })(Languages || {});
 
   // src/ViewModel/Global/coreViewModel.ts
   var CoreViewModel = class {
@@ -6249,61 +6259,60 @@
   // src/Model/Global/settingsModel.ts
   var SettingsModel = class _SettingsModel {
     // storage
-    setName(newValue) {
-      this.username = newValue;
+    storeSetting(pathName, value) {
       const path = StorageModel.getPath(
         "settings" /* SettingsModel */,
-        filePaths.settingsModel.username
+        filePaths.settingsModel[pathName]
       );
-      this.storageModel.write(path, newValue);
+      this.storageModel.write(path, value);
+    }
+    setName(newValue) {
+      this.username = newValue;
+      this.storeSetting("username", newValue);
     }
     setFirstDayOfWeek(newValue) {
       this.firstDayOfWeek = newValue;
-      const path = StorageModel.getPath(
-        "settings" /* SettingsModel */,
-        filePaths.settingsModel.firstDayOfWeek
-      );
-      this.storageModel.write(path, newValue);
+      this.storeSetting("firstDayOfWeek", newValue);
     }
     setLanguage(newValue) {
       this.language = newValue;
-      const path = StorageModel.getPath(
-        "settings" /* SettingsModel */,
-        filePaths.settingsModel.language
-      );
-      this.storageModel.write(path, newValue);
+      this.storeSetting("language", newValue);
+    }
+    setTheme(newValue) {
+      this.theme = newValue;
+      this.storeSetting("theme", newValue);
     }
     // load
-    loadUsername() {
+    readSetting(pathName) {
       const path = StorageModel.getPath(
         "settings" /* SettingsModel */,
-        filePaths.settingsModel.username
+        filePaths.settingsModel[pathName]
       );
-      const content = this.storageModel.read(path);
+      return this.storageModel.read(path);
+    }
+    loadUsername() {
+      const content = this.readSetting("username");
       this.username = content ?? "";
     }
     loadFirstDayofWeek() {
-      const path = StorageModel.getPath(
-        "settings" /* SettingsModel */,
-        filePaths.settingsModel.firstDayOfWeek
-      );
-      const content = this.storageModel.read(path);
+      const content = this.readSetting("firstDayOfWeek");
       this.firstDayOfWeek = content ?? "0";
     }
     loadLanguage() {
-      const path = StorageModel.getPath(
-        "settings" /* SettingsModel */,
-        filePaths.settingsModel.language
-      );
-      const content = this.storageModel.read(path);
+      const content = this.readSetting("language");
       this.language = content ?? _SettingsModel.getSystemLanguage();
     }
+    loadTheme() {
+      const content = this.readSetting("theme");
+      this.theme = content ?? "system" /* System */;
+    }
     // init
     constructor(storageModel2) {
       this.storageModel = storageModel2;
       this.loadUsername();
       this.loadFirstDayofWeek();
       this.loadLanguage();
+      this.loadTheme();
     }
     static getSystemLanguage() {
       switch (navigator.language.substring(0, 2)) {
@@ -6316,9 +6325,15 @@
       }
     }
   };
+  var Languages = /* @__PURE__ */ ((Languages2) => {
+    Languages2["English"] = "en";
+    Languages2["German"] = "de";
+    Languages2["Spanish"] = "es";
+    return Languages2;
+  })(Languages || {});
 
   // src/ViewModel/Global/settingsViewModel.ts
-  var SettingsViewModel = class {
+  var SettingsViewModel = class _SettingsViewModel {
     // init
     constructor(coreViewModel2) {
       this.coreViewModel = coreViewModel2;
@@ -6331,7 +6346,12 @@
       );
       this.requiresReload = new State(false);
       this.firstDayOfWeek = new State("0");
-      this.language = new State("en" /* English */);
+      this.language = new State(
+        "en" /* English */
+      );
+      this.theme = new State(
+        "system" /* System */
+      );
       // guards
       this.cannotSetName = createProxyState(
         [this.usernameInput],
@@ -6360,15 +6380,41 @@
       this.showModalPage = (page) => {
         this.selectedModalPage.value = page;
       };
+      // view
+      this.applyTheme = () => {
+        let theme = this.theme.value;
+        if (theme == "system" /* System */) {
+          theme = _SettingsViewModel.getSystemTheme();
+        }
+        document.body.setAttribute("theme", theme);
+      };
       this.username.value = coreViewModel2.settingsModel.username;
       this.usernameInput.value = coreViewModel2.settingsModel.username;
       this.firstDayOfWeek.value = coreViewModel2.settingsModel.firstDayOfWeek;
       this.language.value = coreViewModel2.settingsModel.language;
+      this.theme.value = coreViewModel2.settingsModel.theme;
       this.firstDayOfWeek.subscribe(this.setFirstDayofWeek);
       this.language.subscribeSilent((newValue) => {
         this.coreViewModel.settingsModel.setLanguage(newValue);
         this.requiresReload.value = true;
       });
+      this.theme.subscribeSilent((newValue) => {
+        this.coreViewModel.settingsModel.setTheme(newValue);
+      });
+      this.theme.subscribe(() => {
+        this.applyTheme();
+      });
+      _SettingsViewModel.generateThemeMedia().addEventListener(
+        "change",
+        () => this.applyTheme()
+      );
+    }
+    static generateThemeMedia() {
+      return window.matchMedia("(prefers-color-scheme: dark)");
+    }
+    static getSystemTheme() {
+      const media = _SettingsViewModel.generateThemeMedia();
+      return media.matches == true ? "dark" /* Dark */ : "light" /* Light */;
     }
   };
 
@@ -6736,6 +6782,33 @@
     return true;
   }
 
+  // src/View/Components/optionButton.tsx
+  function OptionButton(text, value, selection) {
+    function select() {
+      selection.value = value;
+    }
+    const isSelected = createProxyState(
+      [selection],
+      () => selection.value == value
+    );
+    return /* @__PURE__ */ createElement("button", { class: "standard", "toggle:selected": isSelected, "on:click": select }, text);
+  }
+
+  // src/View/Components/optionButtonList.tsx
+  function OptionButtonList(options, selection) {
+    function OptionToView(option) {
+      const [text, value] = option;
+      return OptionButton(text, value, selection);
+    }
+    return /* @__PURE__ */ createElement(
+      "div",
+      {
+        class: "flex-column gap",
+        "children:append": [options, OptionToView]
+      }
+    );
+  }
+
   // src/View/Modals/settingsModal.tsx
   function SettingsModal(coreViewModel2, settingsViewModel2) {
     const detailView = createProxyState(
@@ -6743,7 +6816,10 @@
       () => {
         switch (settingsViewModel2.selectedModalPage.value) {
           case 0 /* Appearance */:
-            return /* @__PURE__ */ createElement("div", null, "Appearance");
+            return SettingsAppearancePane(
+              coreViewModel2,
+              settingsViewModel2
+            );
           case 1 /* Regional */:
             return SettingsRegionalPane(
               coreViewModel2,
@@ -6822,6 +6898,25 @@
       )
     )), /* @__PURE__ */ createElement("span", { class: "icon" }, "arrow_drop_down"))));
   }
+  function SettingsAppearancePane(coreViewModel2, settingsViewModel2) {
+    return /* @__PURE__ */ createElement("div", { class: "slide-up" }, /* @__PURE__ */ createElement("h2", null, coreViewModel2.translations.settings.pages.appearance), /* @__PURE__ */ createElement("hr", null), OptionButtonList(
+      new ListState([
+        [
+          coreViewModel2.translations.settings.themes.dark,
+          "dark" /* Dark */
+        ],
+        [
+          coreViewModel2.translations.settings.themes.light,
+          "light" /* Light */
+        ],
+        [
+          coreViewModel2.translations.settings.themes.system,
+          "system" /* System */
+        ]
+      ]),
+      settingsViewModel2.theme
+    ));
+  }
 
   // src/index.tsx
   var storageModel = new StorageModel();
diff --git a/dist/styles.css b/dist/styles.css
index 57bd6632..607bd958 100644
--- a/dist/styles.css
+++ b/dist/styles.css
@@ -74,52 +74,50 @@ COLORS
     --danger-active: #750e13;
 }
 
-@media (prefers-color-scheme: dark) {
+body[theme="dark"] {
+    --background: hsla(0, 0%, 9%, 100%);
+    --background-glass: hsla(0, 0%, 9%, 20%);
+    --background-transparent: hsla(0, 0%, 100%, 5%);
+    --background-hover: hsla(0, 0%, 55%, 16%);
+    --background-active: hsla(0, 0%, 55%, 40%);
+
+    --layer: hsla(0, 0%, 15%, 60%);
+
+    --surface: hsla(0, 0%, 100%, 4%);
+    --surface-hover: hsla(0, 0%, 100%, 10%);
+    --surface-active: hsla(0, 0%, 100%, 15%);
+
+    --border: hsla(0, 0%, 100%, 10%);
+    --surface-border: #6f6f6f;
+
+    --text-normal: #f4f4f4;
+    --text-placeholder: hsla(0, 0%, 100%, 30%);
+
+    --text-success: #42be65;
+    --text-warning: #f1c21b;
+    --text-error: #fa4d56;
+    --text-info: #4589ff;
+
+    --link: #78a9ff;
+    --link-hover: #a6c8ff;
+}
+
+@media (display-mode: standalone) {
     :root {
-        --background: hsla(0, 0%, 9%, 100%);
-        --background-glass: hsla(0, 0%, 9%, 20%);
-        --background-transparent: hsla(0, 0%, 100%, 5%);
-        --background-hover: hsla(0, 0%, 55%, 16%);
-        --background-active: hsla(0, 0%, 55%, 40%);
-
-        --layer: hsla(0, 0%, 15%, 60%);
-
-        --surface: hsla(0, 0%, 100%, 4%);
-        --surface-hover: hsla(0, 0%, 100%, 10%);
-        --surface-active: hsla(0, 0%, 100%, 15%);
-
-        --border: hsla(0, 0%, 100%, 10%);
-        --surface-border: #6f6f6f;
-
-        --text-normal: #f4f4f4;
-        --text-placeholder: hsla(0, 0%, 100%, 30%);
-
-        --text-success: #42be65;
-        --text-warning: #f1c21b;
-        --text-error: #fa4d56;
-        --text-info: #4589ff;
-
-        --link: #78a9ff;
-        --link-hover: #a6c8ff;
-    }
-
-    @media (display-mode: standalone) {
-        :root {
-            --background: hsla(0, 0%, 0%, 100%);
-            --background-transparent: hsla(0, 0%, 0%, 60%);
-            --layer: hsla(0, 0%, 0%, 60%);
-        }
+        --background: hsla(0, 0%, 0%, 100%);
+        --background-transparent: hsla(0, 0%, 0%, 60%);
+        --layer: hsla(0, 0%, 0%, 60%);
     }
 }
 
 /* basic */
 html {
     background: black;
-    color: var(--text-normal);
 }
 
 body {
     background: var(--background);
+    color: var(--text-normal);
 }
 
 .tile {
@@ -284,7 +282,7 @@ SIZES
 
     /* padding */
     --control-padding: 1rem;
-    --control-padding-compact: .4rem .8rem;
+    --control-padding-compact: 0.4rem 0.8rem;
     --control-marker-padding: 0.7rem;
     --content-padding: 1rem;
     --modal-padding: 1.25rem;
diff --git a/src/Model/Global/settingsModel.ts b/src/Model/Global/settingsModel.ts
index 4a322df2..d14b0925 100644
--- a/src/Model/Global/settingsModel.ts
+++ b/src/Model/Global/settingsModel.ts
@@ -12,7 +12,10 @@ export default class SettingsModel {
     theme: string;
 
     // storage
-    private storeSetting(pathName: keyof typeof filePaths.settingsModel, value: string): void {
+    private storeSetting(
+        pathName: keyof typeof filePaths.settingsModel,
+        value: string,
+    ): void {
         const path = StorageModel.getPath(
             StorageModelSubPaths.SettingsModel,
             filePaths.settingsModel[pathName],
@@ -41,7 +44,9 @@ export default class SettingsModel {
     }
 
     // load
-    private readSetting(pathName: keyof typeof filePaths.settingsModel): string {
+    private readSetting(
+        pathName: keyof typeof filePaths.settingsModel,
+    ): string {
         const path = StorageModel.getPath(
             StorageModelSubPaths.SettingsModel,
             filePaths.settingsModel[pathName],
@@ -76,6 +81,7 @@ export default class SettingsModel {
         this.loadUsername();
         this.loadFirstDayofWeek();
         this.loadLanguage();
+        this.loadTheme();
     }
 
     static getSystemLanguage(): Languages {
@@ -100,4 +106,4 @@ export enum ThemeSettings {
     Dark = "dark",
     Light = "light",
     System = "system",
-}
\ No newline at end of file
+}
diff --git a/src/View/Components/optionButton.tsx b/src/View/Components/optionButton.tsx
new file mode 100644
index 00000000..ba20bf92
--- /dev/null
+++ b/src/View/Components/optionButton.tsx
@@ -0,0 +1,21 @@
+import * as React from "bloatless-react";
+
+export function OptionButton<T>(
+    text: string,
+    value: T,
+    selection: React.State<T>,
+) {
+    function select() {
+        selection.value = value;
+    }
+    const isSelected = React.createProxyState(
+        [selection],
+        () => selection.value == value,
+    );
+
+    return (
+        <button class="standard" toggle:selected={isSelected} on:click={select}>
+            {text}
+        </button>
+    );
+}
diff --git a/src/View/Components/optionButtonList.tsx b/src/View/Components/optionButtonList.tsx
new file mode 100644
index 00000000..8c3c0056
--- /dev/null
+++ b/src/View/Components/optionButtonList.tsx
@@ -0,0 +1,19 @@
+import * as React from "bloatless-react";
+import { OptionButton } from "./optionButton";
+
+export function OptionButtonList<T>(
+    options: React.ListState<[string, T]>,
+    selection: React.State<T>,
+) {
+    function OptionToView(option: [string, T]) {
+        const [text, value] = option;
+        return OptionButton(text, value, selection);
+    }
+
+    return (
+        <div
+            class="flex-column gap"
+            children:append={[options, OptionToView]}
+        ></div>
+    );
+}
diff --git a/src/View/Modals/settingsModal.tsx b/src/View/Modals/settingsModal.tsx
index 03f1c4cf..e2de34d3 100644
--- a/src/View/Modals/settingsModal.tsx
+++ b/src/View/Modals/settingsModal.tsx
@@ -8,7 +8,9 @@ import { SplitModal } from "../Components/splitModal";
 import { InfoTile } from "../Components/infoTile";
 import { Option } from "../Components/option";
 import CoreViewModel from "../../ViewModel/Global/coreViewModel";
-import { Languages } from "../../Model/Global/settingsModel";
+import { Languages, ThemeSettings } from "../../Model/Global/settingsModel";
+import { OptionButtonList } from "../Components/optionButtonList";
+import { stringify } from "../../Model/Utility/utility";
 
 export function SettingsModal(
     coreViewModel: CoreViewModel,
@@ -19,7 +21,10 @@ export function SettingsModal(
         () => {
             switch (settingsViewModel.selectedModalPage.value) {
                 case SettingsModalPages.Appearance:
-                    return <div>Appearance</div>;
+                    return SettingsAppearancePane(
+                        coreViewModel,
+                        settingsViewModel,
+                    );
                 case SettingsModalPages.Regional:
                     return SettingsRegionalPane(
                         coreViewModel,
@@ -161,8 +166,7 @@ function SettingsRegionalPane(
                             Option(
                                 languageNames[language],
                                 language,
-                                language ==
-                                    settingsViewModel.language.value,
+                                language == settingsViewModel.language.value,
                             ),
                         )}
                     </select>
@@ -172,3 +176,32 @@ function SettingsRegionalPane(
         </div>
     );
 }
+
+function SettingsAppearancePane(
+    coreViewModel: CoreViewModel,
+    settingsViewModel: SettingsViewModel,
+) {
+    return (
+        <div class="slide-up">
+            <h2>{coreViewModel.translations.settings.pages.appearance}</h2>
+            <hr></hr>
+            {OptionButtonList(
+                new React.ListState<[string, ThemeSettings]>([
+                    [
+                        coreViewModel.translations.settings.themes.dark,
+                        ThemeSettings.Dark,
+                    ],
+                    [
+                        coreViewModel.translations.settings.themes.light,
+                        ThemeSettings.Light,
+                    ],
+                    [
+                        coreViewModel.translations.settings.themes.system,
+                        ThemeSettings.System,
+                    ],
+                ]),
+                settingsViewModel.theme,
+            )}
+        </div>
+    );
+}
diff --git a/src/View/translations.ts b/src/View/translations.ts
index 59946ca3..9331c9b4 100644
--- a/src/View/translations.ts
+++ b/src/View/translations.ts
@@ -80,6 +80,11 @@ const englishTranslations = {
             regional: "Language & Region",
             info: "About Comms",
         },
+        themes: {
+            dark: "Dark",
+            light: "Light",
+            system: "Device theme",
+        },
 
         version: "Version",
         language: "Language",
@@ -375,6 +380,11 @@ export const allTranslations: {
                 regional: "Sprache & Region",
                 info: "Über Comms",
             },
+            themes: {
+                dark: "Dunkel",
+                light: "Hell",
+                system: "Geräteeinstellung",
+            },
 
             version: "Version",
             language: "Sprache",
@@ -639,6 +649,11 @@ export const allTranslations: {
                 regional: "Idioma y Región",
                 info: "Sobre Comms",
             },
+            themes: {
+                dark: "Oscuro",
+                light: "Claro",
+                system: "Según dispositivo",
+            },
 
             version: "Versión",
             language: "Idioma",
@@ -832,6 +847,6 @@ export const languageNames = {
     en: "English",
     de: "Deutsch",
     es: "Español",
-}
+};
 
-export type Translations = typeof englishTranslations;
\ No newline at end of file
+export type Translations = typeof englishTranslations;
diff --git a/src/ViewModel/Global/settingsViewModel.ts b/src/ViewModel/Global/settingsViewModel.ts
index 4b4f2b53..488a684f 100644
--- a/src/ViewModel/Global/settingsViewModel.ts
+++ b/src/ViewModel/Global/settingsViewModel.ts
@@ -1,8 +1,7 @@
 import * as React from "bloatless-react";
 
 import CoreViewModel from "./coreViewModel";
-import SettingsModel from "../../Model/Global/settingsModel";
-import { Languages } from "../../View/translations";
+import { Languages, ThemeSettings } from "../../Model/Global/settingsModel";
 
 export default class SettingsViewModel {
     // state
@@ -15,7 +14,12 @@ export default class SettingsViewModel {
     requiresReload = new React.State<boolean>(false);
 
     firstDayOfWeek: React.State<string> = new React.State("0");
-    language: React.State<Languages|string> = new React.State(Languages.English);
+    language: React.State<Languages | string> = new React.State(
+        Languages.English,
+    );
+    theme: React.State<ThemeSettings | string> = new React.State(
+        ThemeSettings.System,
+    );
 
     // guards
     cannotSetName: React.State<boolean> = React.createProxyState(
@@ -54,19 +58,49 @@ export default class SettingsViewModel {
         this.selectedModalPage.value = page;
     };
 
+    // view
+    applyTheme = (): void => {
+        let theme = this.theme.value;
+        if (theme == ThemeSettings.System) {
+            theme = SettingsViewModel.getSystemTheme();
+        }
+        document.body.setAttribute("theme", theme);
+    };
+
     // init
     constructor(public coreViewModel: CoreViewModel) {
         this.username.value = coreViewModel.settingsModel.username;
         this.usernameInput.value = coreViewModel.settingsModel.username;
         this.firstDayOfWeek.value = coreViewModel.settingsModel.firstDayOfWeek;
         this.language.value = coreViewModel.settingsModel.language;
+        this.theme.value = coreViewModel.settingsModel.theme;
 
         // subscriptions
         this.firstDayOfWeek.subscribe(this.setFirstDayofWeek);
         this.language.subscribeSilent((newValue) => {
             this.coreViewModel.settingsModel.setLanguage(newValue);
             this.requiresReload.value = true;
-        })
+        });
+        this.theme.subscribeSilent((newValue) => {
+            this.coreViewModel.settingsModel.setTheme(newValue);
+        });
+
+        // set theme
+        this.theme.subscribe(() => {
+            this.applyTheme();
+        });
+        SettingsViewModel.generateThemeMedia().addEventListener("change", () =>
+            this.applyTheme(),
+        );
+    }
+
+    static generateThemeMedia(): MediaQueryList {
+        return window.matchMedia("(prefers-color-scheme: dark)");
+    }
+
+    static getSystemTheme(): string {
+        const media = SettingsViewModel.generateThemeMedia();
+        return media.matches == true ? ThemeSettings.Dark : ThemeSettings.Light;
     }
 }
 
diff --git a/src/base.css b/src/base.css
index e20d6a98..d6089b0f 100644
--- a/src/base.css
+++ b/src/base.css
@@ -76,23 +76,21 @@ main {
     );
 }
 
-@media (prefers-color-scheme: dark) {
-    #background-wrapper {
-        opacity: 0.5;
-    }
-
-    #background-wrapper #sky {
-        --color-1: hsl(188, 100%, 30%);
-        --color-2: hsl(194, 72%, 24%);
-    }
-
-    #background-wrapper #grass-1 {
-        --color-1: hsl(120, 30%, 30%);
-        --color-2: hsl(120, 30%, 24%);
-    }
-
-    #background-wrapper #grass-2 {
-        --color-1: hsl(110, 60%, 30%);
-        --color-2: hsl(110, 50%, 24%);
-    }
+body[theme="dark"] #background-wrapper {
+    opacity: 0.5;
+}
+
+body[theme="dark"] #background-wrapper #sky {
+    --color-1: hsl(188, 100%, 30%);
+    --color-2: hsl(194, 72%, 24%);
+}
+
+body[theme="dark"] #background-wrapper #grass-1 {
+    --color-1: hsl(120, 30%, 30%);
+    --color-2: hsl(120, 30%, 24%);
+}
+
+body[theme="dark"] #background-wrapper #grass-2 {
+    --color-1: hsl(110, 60%, 30%);
+    --color-2: hsl(110, 50%, 24%);
 }
diff --git a/src/colors.css b/src/colors.css
index 0aac46ed..8b93e054 100644
--- a/src/colors.css
+++ b/src/colors.css
@@ -12,15 +12,13 @@
     --surface-active: hsla(var(--hue), 100%, 5%, 15%);
 }
 
-@media (prefers-color-scheme: dark) {
-    [color]:not([color="standard"]) {
-        --accent-luma: var(--accent-luma-dark);
-        --accent-text-luma: var(--accent-text-luma-dark);
+body[theme="dark"] [color]:not([color="standard"]) {
+    --accent-luma: var(--accent-luma-dark);
+    --accent-text-luma: var(--accent-text-luma-dark);
 
-        --surface: hsla(var(--hue), 100%, 95%, 5%);
-        --surface-hover: hsla(var(--hue), 100%, 95%, 10%);
-        --surface-active: hsla(var(--hue), 100%, 95%, 15%);
-    }
+    --surface: hsla(var(--hue), 100%, 95%, 5%);
+    --surface-hover: hsla(var(--hue), 100%, 95%, 10%);
+    --surface-active: hsla(var(--hue), 100%, 95%, 15%);
 }
 
 /* tile */
@@ -44,16 +42,14 @@
     --text-normal: hsl(var(--hue), 100%, var(--text-luma));
 }
 
-@media (prefers-color-scheme: dark) {
-    [color]:not([color="standard"]).tile {
-        --gradient-luma-1: 20%;
-        --gradient-luma-2: 15%;
+body[theme="dark"] [color]:not([color="standard"]).tile {
+    --gradient-luma-1: 20%;
+    --gradient-luma-2: 15%;
 
-        --hover-luma: 25%;
-        --active-luma: 30%;
+    --hover-luma: 25%;
+    --active-luma: 30%;
 
-        --text-luma: 90%;
-    }
+    --text-luma: 90%;
 }
 
 /* fill */
@@ -74,11 +70,9 @@
         background: hsl(var(--hue), var(--sat), var(--luma), 40%);
     }
 
-    @media (prefers-color-scheme: dark) {
-        [color]:not([color="standard"]).background {
-            --luma: var(--background-luma-dark);
-            --sat: 100%;
-        }
+    body[theme="dark"] [color]:not([color="standard"]).background {
+        --luma: var(--background-luma-dark);
+        --sat: 100%;
     }
 
     [color="standard"].background {
@@ -92,15 +86,13 @@
     background: hsl(var(--hue), 100%, var(--luma), 50%);
 }
 
-@media (prefers-color-scheme: dark) {
-    [color]:not([color="standard"]).subtle-background {
-        --luma: var(--subtle-luma-dark);
-    }
+body[theme="dark"] [color]:not([color="standard"]).subtle-background {
+    --luma: var(--subtle-luma-dark);
+}
 
-    @media (display-mode: standalone) {
-        [color]:not([color="standard"]).subtle-background {
-            --luma: 0%;
-        }
+@media (display-mode: standalone) {
+    [color]:not([color="standard"]).subtle-background {
+        --luma: 0%;
     }
 }