import 'package:flutter/material.dart';void main() { runApp(MyApp());}class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( // 앱 바 푸른색으로 지정하기 theme: ThemeData( appBarTheme: AppBarTheme( backgroundColor: Colors.blue, ) ), home: Scaffold( appBar: AppBar(title: Text('Test')), body: Colu..