Dark ThemeAdding dark mode to your Appsetup import "./themes/app_theme.dart"; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: FlutcnTheme.darkTheme(), home: const MyHomePage(title: 'Flutter Demo Home Page'), ); } } Note press hot reload and you will see the dark theme applied to your app.PreviousButton