lib/home_page.dart

@@ -170,7 +170,9 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
 
   @override
   Widget build(BuildContext context) {
-    return Padding(
+    return Scaffold(
+      backgroundColor: Theme.of(context).colorScheme.onPrimary,
+      body: Padding(
         padding: const EdgeInsets.fromLTRB(0, 20, 0 , 20),
         child: Scaffold(
           key: _scaffoldKey,
@@ -180,6 +182,8 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
               _emailPageKey.currentState?.updateSelectedFolder(folder);
             },
           ),
+          body: Scaffold(
+            backgroundColor: Theme.of(context).colorScheme.onPrimary,
             body: Padding(
               padding: const EdgeInsets.fromLTRB(0, 20, 0, 0),
               child: Stack(
@@ -412,6 +416,8 @@ class _HomeScreenState extends State<HomeScreen> with TickerProviderStateMixin {
               ),
             ),
           ),
+        ),
+      ),
     );
   }
 }

lib/main.dart

@@ -17,7 +17,10 @@ class HyM extends StatelessWidget {
   Widget build(BuildContext context) {
     return MaterialApp(
       debugShowCheckedModeBanner: false,
-      theme: ThemeData.light(),
+      theme: ThemeData(
+        colorScheme: ColorScheme.light(),
+        useMaterial3: true,
+      ),
       title: 'HyM',
       // home: HomeScreen(),
       initialRoute: "/",