diff --git a/public/images/robo/robo_event_dark.png b/public/images/robo/robo_event_dark.png
new file mode 100644
index 0000000..f289541
Binary files /dev/null and b/public/images/robo/robo_event_dark.png differ
diff --git a/src/App.tsx b/src/App.tsx
index 6438666..1c2cdf3 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -7,6 +7,7 @@ import { BrowserRouter, Routes, Route } from "react-router-dom";
 import { HelmetProvider } from "react-helmet-async"; 
 import { LanguageProvider } from "@/contexts/LanguageContext";
 import { AuthProvider, useAuth } from "@/contexts/AuthContext";
+import { ThemeProvider } from "@/contexts/ThemeContext";
 import Main from "./components/app/Main";
 import LoginContainer from "./components/auth/LoginContainer";
 import ArtistCollabForm from "@/features/event/components/ArtistCollabForm";
@@ -31,15 +32,17 @@ const App = () => (
   <HelmetProvider>
     <QueryClientProvider client={queryClient}>
       <TooltipProvider>
-        <LanguageProvider>
-          <AuthProvider>
-            <Toaster />
-            <Sonner />
-            <BrowserRouter>
-              <AppContent />
-            </BrowserRouter>
-          </AuthProvider>
-        </LanguageProvider>
+        <ThemeProvider>
+          <LanguageProvider>
+            <AuthProvider>
+              <Toaster />
+              <Sonner />
+              <BrowserRouter>
+                <AppContent />
+              </BrowserRouter>
+            </AuthProvider>
+          </LanguageProvider>
+        </ThemeProvider>
       </TooltipProvider>
     </QueryClientProvider>
   </HelmetProvider>
diff --git a/src/components/app/Main.tsx b/src/components/app/Main.tsx
index 211004d..4be4c74 100644
--- a/src/components/app/Main.tsx
+++ b/src/components/app/Main.tsx
@@ -1,7 +1,8 @@
 import React, { useState, useEffect } from 'react';
 import { Button } from "@/components/ui/button";
-import { LogOut, Menu } from 'lucide-react';
+import { LogOut, Menu, Moon, Sun } from 'lucide-react';
 import { useAuth } from '@/contexts/AuthContext';
+import { useTheme } from '@/contexts/ThemeContext';
 import { useNavigate } from 'react-router-dom';
 import  DashboardContainer  from '../dashboard/DashboardContainer';
 import { DropdownMenu, DropdownMenuContent, DropdownMenuItem, DropdownMenuSeparator, DropdownMenuTrigger } from '@/components/ui/dropdown-menu';
@@ -17,6 +18,7 @@ const MainShell: React.FC = () => {
   }, [resetHeader]);
 
   const { logout } = useAuth();
+  const { theme, toggleTheme } = useTheme();
   const navigate = useNavigate();
   const [hasActiveEvent, setHasActiveEvent] = useState(false);
   // header is already available above
@@ -71,13 +73,13 @@ const MainShell: React.FC = () => {
               <img
                 src="/icon.png"
                 alt="Logo"
-                className="h-9 w-9 object-contain"
+                className="h-9 w-9 object-contain dark:invert dark:brightness-125"
               />
               {!header.left && (
                 <img
                   src="/Logo.png"
                   alt="Logo"
-                  className="hidden md:block h-10 w-auto object-contain"
+                  className="hidden md:block h-10 w-auto object-contain dark:invert dark:brightness-125"
                 />
               )}
             </div>
@@ -91,6 +93,10 @@ const MainShell: React.FC = () => {
               <DropdownMenuContent align="start">
                 {header.mobileMenu}
                 {header.mobileMenu ? <DropdownMenuSeparator /> : null}
+                <DropdownMenuItem onClick={toggleTheme} className="gap-2">
+                  {theme === 'dark' ? <Sun className="h-4 w-4" /> : <Moon className="h-4 w-4" />}
+                  <span>{theme === 'dark' ? 'Light Mode' : 'Dark Mode'}</span>
+                </DropdownMenuItem>
                 <DropdownMenuItem onClick={logout} className="gap-2">
                   <LogOut className="h-4 w-4" />
                   <span>Abmelden</span>
@@ -108,6 +114,15 @@ const MainShell: React.FC = () => {
           </div>
           
           <div className="flex items-center gap-2 pointer-events-auto">
+            <Button
+              variant="ghost"
+              size="icon"
+              className="hidden md:inline-flex"
+              onClick={toggleTheme}
+              aria-label={theme === 'dark' ? 'Light Mode aktivieren' : 'Dark Mode aktivieren'}
+            >
+              {theme === 'dark' ? <Sun className="h-5 w-5" /> : <Moon className="h-5 w-5" />}
+            </Button>
             <Button
               variant="outline"
               size="sm"
diff --git a/src/components/auth/LoginForm.tsx b/src/components/auth/LoginForm.tsx
index 8ec18cb..3f93bf3 100644
--- a/src/components/auth/LoginForm.tsx
+++ b/src/components/auth/LoginForm.tsx
@@ -31,7 +31,7 @@ const LoginForm: React.FC<LoginFormProps> = ({ onSubmit, isLoading: externalLoad
     <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-primary/20 to-secondary/20">
       <Card className="w-full max-w-md">
         <CardHeader>
-          <img src="/Logo.png" alt="Logo" className="mx-auto mb-2 h-24 w-40 object-contain" />
+          <img src="/Logo.png" alt="Logo" className="mx-auto mb-2 h-24 w-40 object-contain dark:invert dark:brightness-125" />
           <CardTitle className="text-2xl font-bold text-center">Login Erforderlich</CardTitle>
         </CardHeader>
         <CardContent>
diff --git a/src/components/dashboard/Dashboard.tsx b/src/components/dashboard/Dashboard.tsx
index 0e6190e..b5be759 100644
--- a/src/components/dashboard/Dashboard.tsx
+++ b/src/components/dashboard/Dashboard.tsx
@@ -4,6 +4,7 @@ import { type Event } from '@/features/event/api/eventService';
 import { type DashboardModule, type DashboardModuleContext } from '@/components/dashboard/dashboardModuleTypes';
 import { eventDashboardModule } from '@/features/event/dashboardModule';
 import { quickPostDashboardModule } from '@/features/photopost/dashboardModule';
+import { useTheme } from '@/contexts/ThemeContext';
 
 const DASHBOARD_ACTIVE_MODULE_KEY = 'kgb.dashboard.activeModuleId';
 
@@ -51,6 +52,7 @@ interface DashboardProps {
 }
 
 const Dashboard: React.FC<DashboardProps> = ({ onActionClick, hasActiveEvent, currentEvent }) => {
+  const { theme } = useTheme();
   const [activeModuleId, setActiveModuleId] = useState<string | null>(() => {
     try {
       return sessionStorage.getItem(DASHBOARD_ACTIVE_MODULE_KEY);
@@ -110,7 +112,11 @@ const Dashboard: React.FC<DashboardProps> = ({ onActionClick, hasActiveEvent, cu
               title={module.getTitle(ctx)}
               description={module.getDescription(ctx)}
               onClick={() => setActiveModuleId(module.id)}
-              illustration={module.getIllustration?.(ctx)}
+              illustration={
+                theme === 'dark'
+                  ? module.getIllustrationDark?.(ctx) ?? module.getIllustration?.(ctx)
+                  : module.getIllustration?.(ctx)
+              }
             />
           ))}
         </div>
diff --git a/src/components/dashboard/dashboardModuleTypes.ts b/src/components/dashboard/dashboardModuleTypes.ts
index cce1913..85fe50b 100644
--- a/src/components/dashboard/dashboardModuleTypes.ts
+++ b/src/components/dashboard/dashboardModuleTypes.ts
@@ -10,6 +10,7 @@ export interface DashboardModule {
   getTitle: (ctx: DashboardModuleContext) => string;
   getDescription: (ctx: DashboardModuleContext) => string;
   getIllustration?: (ctx: DashboardModuleContext) => string | undefined;
+  getIllustrationDark?: (ctx: DashboardModuleContext) => string | undefined;
   isVisible?: (ctx: DashboardModuleContext) => boolean;
   renderWizard: (ctx: DashboardModuleContext, onBack: () => void) => React.ReactNode;
 }
diff --git a/src/contexts/ThemeContext.tsx b/src/contexts/ThemeContext.tsx
new file mode 100644
index 0000000..f38a29b
--- /dev/null
+++ b/src/contexts/ThemeContext.tsx
@@ -0,0 +1,62 @@
+import React, { createContext, useCallback, useContext, useEffect, useMemo, useState } from 'react';
+
+type Theme = 'light' | 'dark';
+
+type ThemeContextValue = {
+  theme: Theme;
+  setTheme: (next: Theme) => void;
+  toggleTheme: () => void;
+};
+
+const THEME_STORAGE_KEY = 'kgb.theme';
+
+const ThemeContext = createContext<ThemeContextValue | null>(null);
+
+function getSystemTheme(): Theme {
+  if (typeof window === 'undefined' || typeof window.matchMedia !== 'function') return 'light';
+  return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
+}
+
+function applyThemeToDom(theme: Theme) {
+  if (typeof document === 'undefined') return;
+  document.documentElement.classList.toggle('dark', theme === 'dark');
+}
+
+export const ThemeProvider: React.FC<{ children: React.ReactNode }> = ({ children }) => {
+  const [theme, setThemeState] = useState<Theme>(() => {
+    try {
+      const stored = localStorage.getItem(THEME_STORAGE_KEY);
+      if (stored === 'light' || stored === 'dark') return stored;
+    } catch {
+      // ignore
+    }
+    return getSystemTheme();
+  });
+
+  useEffect(() => {
+    applyThemeToDom(theme);
+    try {
+      localStorage.setItem(THEME_STORAGE_KEY, theme);
+    } catch {
+      // ignore
+    }
+  }, [theme]);
+
+  const setTheme = useCallback((next: Theme) => {
+    setThemeState(next);
+  }, []);
+
+  const toggleTheme = useCallback(() => {
+    setThemeState((prev) => (prev === 'dark' ? 'light' : 'dark'));
+  }, []);
+
+  const value = useMemo(() => ({ theme, setTheme, toggleTheme }), [theme, setTheme, toggleTheme]);
+
+  return <ThemeContext.Provider value={value}>{children}</ThemeContext.Provider>;
+};
+
+export const useTheme = () => {
+  const ctx = useContext(ThemeContext);
+  if (!ctx) throw new Error('useTheme must be used within ThemeProvider');
+  return ctx;
+};
diff --git a/src/features/event/components/EventWizard.tsx b/src/features/event/components/EventWizard.tsx
index aaf2519..7ebc011 100644
--- a/src/features/event/components/EventWizard.tsx
+++ b/src/features/event/components/EventWizard.tsx
@@ -1,7 +1,7 @@
 import React, { useEffect, useMemo, useRef, useState } from 'react';
 import { Card, CardContent } from "@/components/ui/card";
 import { Button } from "@/components/ui/button";
-import { DropdownMenuItem } from '@/components/ui/dropdown-menu';
+import { DropdownMenuItem, DropdownMenuSeparator } from '@/components/ui/dropdown-menu';
 import { type Event } from '@/features/event/api/eventService';
 import { ArrowLeft, LayoutGrid } from 'lucide-react';
 import { useHeader } from '@/contexts/HeaderContext';
@@ -103,6 +103,7 @@ const EventWizard: React.FC<EventWizardProps> = ({ onComplete, onBackToOverview,
             <LayoutGrid className="h-4 w-4" />
             <span>Zurück zum Dashboard</span>
           </DropdownMenuItem>
+          {showForm ? <DropdownMenuSeparator /> : null}
           {showForm && (
             <DropdownMenuItem onClick={handleBackToTimeline} className="gap-2">
               <ArrowLeft className="h-4 w-4" />
diff --git a/src/features/event/dashboardModule.tsx b/src/features/event/dashboardModule.tsx
index 95a3bcf..cd20a03 100644
--- a/src/features/event/dashboardModule.tsx
+++ b/src/features/event/dashboardModule.tsx
@@ -7,6 +7,7 @@ export const eventDashboardModule: DashboardModule = {
   getTitle: () => 'Veranstaltung',
   getDescription: () => 'Verwalte deine Veranstaltungen',
   getIllustration: () => '/images/robo/robo_event.png',
+  getIllustrationDark: () => '/images/robo/robo_event_dark.png',
   renderWizard: (_ctx, onBack) => (
     <EventWizardContainer onComplete={onBack} onBackToOverview={onBack} />
   ),
diff --git a/src/index.css b/src/index.css
index 599209b..99d67ba 100644
--- a/src/index.css
+++ b/src/index.css
@@ -69,7 +69,7 @@
     --accent: 175 70% 41%;
     --accent-foreground: 210 40% 98%;
 
-    --destructive: 0 62.8% 30.6%;
+    --destructive: 0 84.2% 62%;
     --destructive-foreground: 210 40% 98%;
 
     --border: 217.2 32.6% 17.5%;