import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      color:Colors.orange,
      child: Container(
              height: 100,
              width: 100,
              clipBehavior: Clip.antiAlias,
              // margin: EdgeInsets.symmetric(horizontal: 20),
              padding: EdgeInsets.symmetric(vertical: 12),
              alignment: Alignment.center,
              decoration: BoxDecoration(
                color: Colors.blue,
                borderRadius: BorderRadius.circular(20),
              ),
        ),
    );
  }
}