diff --git a/index.html b/index.html
index aa648e8..9af3770 100644
--- a/index.html
+++ b/index.html
@@ -36,6 +36,14 @@
             <p id="pageSubtitle">RC race timing with AMMC integration</p>
           </div>
           <div class="topbar-right">
+            <label class="lang-wrap theme-wrap">
+              <span id="themeLabel">Theme</span>
+              <select id="themeSelect" class="lang-select theme-select">
+                <option value="dark">Dark</option>
+                <option value="nord">Nord</option>
+                <option value="light">Light</option>
+              </select>
+            </label>
             <label class="lang-wrap">
               <span id="languageLabel">Language</span>
               <select id="languageSelect" class="lang-select">
diff --git a/src/app.js b/src/app.js
index 8ccf02c..2744a0b 100644
--- a/src/app.js
+++ b/src/app.js
@@ -15,6 +15,8 @@ const NAV_ITEMS = [
 const SESSION_TYPES = ["open_practice", "free_practice", "practice", "qualification", "heat", "final", "team_race"];
 const STORAGE_KEY = "rc_timing_control_v1";
 const DEFAULT_LANGUAGE = "sv";
+const DEFAULT_THEME = "dark";
+const AVAILABLE_THEMES = ["dark", "nord", "light"];
 
 const TRANSLATIONS = {
   sv: {
@@ -41,6 +43,10 @@ const TRANSLATIONS = {
     "nav.guide": "Guide",
     "nav.guide_sub": "Dokumentation och uppstart",
     "ui.language": "Språk",
+    "ui.theme": "Tema",
+    "ui.theme_dark": "Mörk",
+    "ui.theme_nord": "Nord",
+    "ui.theme_light": "Ljus",
     "brand.title": "JMK RB RaceController",
     "brand.subtitle": "RC Timing System",
     "ui.no_active_session": "Ingen aktiv session",
@@ -775,6 +781,10 @@ const TRANSLATIONS = {
     "nav.guide": "Guide",
     "nav.guide_sub": "Documentation and setup",
     "ui.language": "Language",
+    "ui.theme": "Theme",
+    "ui.theme_dark": "Dark",
+    "ui.theme_nord": "Nord",
+    "ui.theme_light": "Light",
     "brand.title": "JMK RB RaceController",
     "brand.subtitle": "RC Timing System",
     "ui.no_active_session": "No Active Session",
@@ -1554,7 +1564,9 @@ init();
 async function init() {
   document.body.classList.toggle("overlay-mode", overlayMode);
   seedDefaultData();
+  applyTheme();
   await hydrateFromBackend();
+  applyTheme();
   await loadAmmcConfigFromBackend();
   renderNav();
   renderView();
@@ -1594,6 +1606,10 @@ function seedDefaultData() {
     state.settings.language = DEFAULT_LANGUAGE;
   }
 
+  if (!AVAILABLE_THEMES.includes(String(state.settings.theme || "").toLowerCase())) {
+    state.settings.theme = DEFAULT_THEME;
+  }
+
   if (typeof state.settings.audioEnabled !== "boolean") {
     state.settings.audioEnabled = true;
   }
@@ -1678,6 +1694,7 @@ function loadState() {
           wsUrl: parsed.settings?.wsUrl || "ws://127.0.0.1:9000",
           backendUrl: parsed.settings?.backendUrl || getDefaultBackendUrl(),
           language: parsed.settings?.language || DEFAULT_LANGUAGE,
+          theme: AVAILABLE_THEMES.includes(String(parsed.settings?.theme || "").toLowerCase()) ? String(parsed.settings.theme).toLowerCase() : DEFAULT_THEME,
           autoReconnect: parsed.settings?.autoReconnect !== false,
           audioEnabled: parsed.settings?.audioEnabled !== false,
           passingSoundMode: parsed.settings?.passingSoundMode || "beep",
@@ -1720,6 +1737,7 @@ function loadState() {
       wsUrl: "ws://127.0.0.1:9000",
       backendUrl: getDefaultBackendUrl(),
       language: DEFAULT_LANGUAGE,
+      theme: DEFAULT_THEME,
       autoReconnect: true,
       audioEnabled: true,
       passingSoundMode: "beep",
@@ -1761,6 +1779,14 @@ function currentLanguage() {
   return state.settings.language === "en" ? "en" : "sv";
 }
 
+function currentTheme() {
+  return AVAILABLE_THEMES.includes(String(state.settings.theme || "").toLowerCase()) ? String(state.settings.theme).toLowerCase() : DEFAULT_THEME;
+}
+
+function applyTheme() {
+  document.body.dataset.theme = currentTheme();
+}
+
 function t(key, vars = {}) {
   const lang = currentLanguage();
   const dict = TRANSLATIONS[lang] || TRANSLATIONS.en;
@@ -1769,6 +1795,23 @@ function t(key, vars = {}) {
 }
 
 function setupLanguageControl() {
+  const themeLabel = document.getElementById("themeLabel");
+  if (themeLabel) {
+    themeLabel.textContent = t("ui.theme");
+  }
+  const themeSelect = document.getElementById("themeSelect");
+  if (themeSelect instanceof HTMLSelectElement) {
+    themeSelect.value = currentTheme();
+    Array.from(themeSelect.options).forEach((option) => {
+      option.textContent = t(`ui.theme_${option.value}`);
+    });
+    themeSelect.onchange = () => {
+      state.settings.theme = AVAILABLE_THEMES.includes(themeSelect.value) ? themeSelect.value : DEFAULT_THEME;
+      applyTheme();
+      saveState();
+    };
+  }
+
   const label = document.getElementById("languageLabel");
   if (label) {
     label.textContent = t("ui.language");
@@ -1966,6 +2009,7 @@ function applyPersistedState(persisted) {
     wsUrl: persisted.settings?.wsUrl || state.settings.wsUrl || "ws://127.0.0.1:9000",
     backendUrl: persisted.settings?.backendUrl || state.settings.backendUrl || getDefaultBackendUrl(),
     language: persisted.settings?.language || state.settings.language || DEFAULT_LANGUAGE,
+    theme: AVAILABLE_THEMES.includes(String(persisted.settings?.theme || state.settings.theme || DEFAULT_THEME).toLowerCase()) ? String(persisted.settings?.theme || state.settings.theme || DEFAULT_THEME).toLowerCase() : DEFAULT_THEME,
     autoReconnect: persisted.settings?.autoReconnect !== false,
     audioEnabled: persisted.settings?.audioEnabled !== false,
     passingSoundMode: persisted.settings?.passingSoundMode || state.settings.passingSoundMode || "beep",
@@ -1987,6 +2031,7 @@ function applyPersistedState(persisted) {
       ? state.settings.racePresets.map((preset) => normalizeStoredRacePreset(preset)).filter((preset) => preset.name)
       : [],
   };
+  applyTheme();
 }
 
 function normalizeSession(session) {
@@ -2405,6 +2450,10 @@ function renderView() {
   if (languageLabel) {
     languageLabel.textContent = t("ui.language");
   }
+  const themeLabel = document.getElementById("themeLabel");
+  if (themeLabel) {
+    themeLabel.textContent = t("ui.theme");
+  }
 
   switch (currentView) {
     case "dashboard":
diff --git a/src/styles.css b/src/styles.css
index b233d20..352d198 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -13,6 +13,36 @@
   --shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
 }
 
+body[data-theme="nord"] {
+  --bg: #0b1220;
+  --bg-soft: #131d31;
+  --panel: #182235;
+  --panel-2: #10192b;
+  --line: #31425f;
+  --text: #edf3ff;
+  --muted: #a7b8d8;
+  --accent: #5e81ac;
+  --accent-2: #88c0d0;
+  --ok: #79c9a4;
+  --warn: #f0c674;
+  --shadow: 0 12px 32px rgba(4, 10, 18, 0.42);
+}
+
+body[data-theme="light"] {
+  --bg: #eef2f8;
+  --bg-soft: #f7f9fc;
+  --panel: #ffffff;
+  --panel-2: #ecf1f7;
+  --line: #cfd8e6;
+  --text: #152033;
+  --muted: #5f708d;
+  --accent: #d62828;
+  --accent-2: #ef4444;
+  --ok: #1f9d67;
+  --warn: #c98914;
+  --shadow: 0 10px 28px rgba(27, 45, 78, 0.12);
+}
+
 * {
   box-sizing: border-box;
 }
@@ -22,9 +52,9 @@ body {
   font-family: Barlow, "Segoe UI", sans-serif;
   color: var(--text);
   background:
-    radial-gradient(circle at 15% 0%, rgba(225, 6, 0, 0.18), transparent 30%),
-    radial-gradient(circle at 100% 80%, rgba(37, 59, 103, 0.22), transparent 30%),
-    linear-gradient(160deg, #05070b 0%, #090d16 55%, #07090e 100%);
+    radial-gradient(circle at 15% 0%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 30%),
+    radial-gradient(circle at 100% 80%, color-mix(in srgb, var(--accent-2) 16%, transparent), transparent 30%),
+    linear-gradient(160deg, color-mix(in srgb, var(--bg) 90%, #000 10%) 0%, var(--bg-soft) 55%, var(--bg) 100%);
   min-height: 100vh;
 }
 
@@ -178,7 +208,7 @@ body {
 .topbar-right {
   display: flex;
   align-items: center;
-  gap: 8px;
+  gap: 10px;
 }
 
 .lang-wrap {
@@ -195,6 +225,14 @@ body {
   border-radius: 8px;
 }
 
+.theme-wrap {
+  min-width: 120px;
+}
+
+.theme-select {
+  min-width: 120px;
+}
+
 .view {
   margin-top: 16px;
 }