import 'package:flutter/material.dart';

void main() => runApp(const IconButtonDemo());

class IconButtonDemo extends StatelessWidget {
  const IconButtonDemo({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        iconButtonTheme: const IconButtonThemeData(
          style: ButtonStyle(iconColor: WidgetStateColor.fromMap({WidgetState.any: Colors.purple})),
        ),
      ),
      home: Scaffold(
        body: Center(
          child: IconButton(
            onPressed: () {},
            icon: const Icon(Icons.build_circle, size: 64),
            color: Colors.green,
          ),
        ),
      ),
    );
  }
}