my_app.dart

class MyApp extends StatelessWidget {
  Config _config;
  
  MyApp(this._config);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _config.name,
      theme: ThemeData(
        primarySwatch: Colors.blue,
        primaryColor: _config.appColor
      ),
      home: MyHomePage(),
    );
  }
}