MaterialApp > ThemeData > primarySwatch: Colors.white

[long25vn]

I/flutter ( 6397): The following assertion was thrown attaching to the render tree:
    I/flutter ( 6397): type 'Color' is not a subtype of type 'MaterialColor'
    I/flutter ( 6397): Either the assertion indicates an error in the framework itself, or we should provide 
    substantially

[long25vn]

const MaterialColor white = const MaterialColor(
  0xFFFFFFFF,
  const <int, Color>{
    50: const Color(0xFFFFFFFF),
    100: const Color(0xFFFFFFFF),
    200: const Color(0xFFFFFFFF),
    300: const Color(0xFFFFFFFF),
    400: const Color(0xFFFFFFFF),
    500: const Color(0xFFFFFFFF),
    600: const Color(0xFFFFFFFF),
    700: const Color(0xFFFFFFFF),
    800: const Color(0xFFFFFFFF),
    900: const Color(0xFFFFFFFF),
  },
);

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: white,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}