FlutterのAppBarの色をオリジナルにしたい!

import 'package:flutter/material.dart';
import 'package:your_project_name/homepage.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(
        appBarTheme: const AppBarTheme(color: Color(0xff191b60)),
      ),
      home: const HomePage(),
    );
  }
}

import 'package:flutter/material.dart';

class HomePage extends StatelessWidget {
  const HomePage({ Key? key }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('HomePage'),
      ),
    );
  }
}