ninja9 ElevatedButton.icon

import 'package:flutter/material.dart';

void main() => runApp(MaterialApp(
      home: Home(),
    ));

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          'App bar',
          style: TextStyle(color: Colors.white),
        ),
        centerTitle: true,
        backgroundColor: Colors.red,
      ),
      //read about elevated button => https://stackoverflow.com/questions/66835173/how-to-change-background-color-of-elevated-button-in-flutter-from-function
      body: Center(
        child: ElevatedButton.icon(
          icon: Icon(
            Icons.mail,
            size: 24.0,
          ),
          label: Text('Send Mail'),
          onPressed: () {
            print('Pressed');
          },
          style : ElevatedButton.styleFrom(
            primary : Colors.amber,
          ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        child: Text('click me'),
        onPressed: null,
        backgroundColor: Colors.red,
      ),
    );
  }
}