lib/theme.dart

@@ -22,6 +22,9 @@ ThemeData _baseTheme(ColorScheme scheme) =>
         shape: RoundedRectangleBorder(
           borderRadius: BorderRadiusGeometry.circular(12),
         ),
+        textColor: scheme.onPrimaryContainer,
+        selectedTileColor: scheme.primaryContainer,
+        selectedColor: scheme.onPrimaryContainer,
         contentPadding: EdgeInsetsDirectional.only(start: 16.0, end: 24.0),
       ),
     );