diff --git a/lib/main.dart b/lib/main.dart
index a5eac83..161dc54 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -5,15 +5,17 @@ import 'package:slothmu/partials/main_scaffold.dart';
 import 'pages/login.dart';
 import 'business_logic/settings.dart' as settings;
 import 'package:flutter_localizations/flutter_localizations.dart';
+import 'themes/themes.dart' as themes;
 
-String initRoute = "/";
+String _initRoute = "/";
 
 void main() async {
   Intl.defaultLocale = 'en_US';
 
   // check if all information is available
+  settings.saveAuthCode("");
   if (await settings.loadAuthCode() == "") {
-    initRoute = "/login";
+    _initRoute = "/login";
   }
   runApp(const Slothmu());
 }
@@ -34,6 +36,7 @@ class _SlothmuState extends State<Slothmu> {
   Widget build(BuildContext context) {
     LocalJsonLocalization.delegate.directories = ['lib/i18n'];
     return MaterialApp(
+      theme: themes.defaultThemeDark,
       supportedLocales: supported,
       localizationsDelegates: [
         GlobalCupertinoLocalizations.delegate,
@@ -41,7 +44,7 @@ class _SlothmuState extends State<Slothmu> {
         GlobalMaterialLocalizations.delegate,
         LocalJsonLocalization.delegate,
       ],
-      initialRoute: initRoute,
+      initialRoute: _initRoute,
       routes: {
         '/': (context) => const MainScaffold(),
         '/login': (context) => const Login(),
diff --git a/lib/themes/themes.dart b/lib/themes/themes.dart
new file mode 100644
index 0000000..ab5493f
--- /dev/null
+++ b/lib/themes/themes.dart
@@ -0,0 +1,15 @@
+import 'package:flutter/material.dart';
+
+final defaultThemeDark = ThemeData(
+    colorScheme: const ColorScheme(
+        brightness: Brightness.dark,
+        primary: Colors.white,
+        onPrimary: Colors.black,
+        secondary: Colors.lime,
+        onSecondary: Colors.black,
+        error: Colors.red,
+        onError: Colors.white,
+        background: Colors.black,
+        onBackground: Colors.white,
+        surface: Colors.deepPurple,
+        onSurface: Colors.white));