icon_example.dart

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(
        appBar: AppBar(
          title: Text('Icon Preview'),
        ),
        backgroundColor: Colors.white,
        body: Center(
          // The icons widget could be styled
          child: Icon(
            Icons.ac_unit, // iconData value
            color: Colors.red, 
            size: 96.0, // logical pixel size as double value
            semanticLabel: 'ac unit' // semantic text
          ),
        ),
      ),
    );
  }
}