import 'package:flutter/material.dart';

const 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(),
        ),
      ),
    );
  }
}

final controller = TextEditingController(text: 'hello world');
final focusNode = FocusNode();

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return EditableText(
      controller: controller,
      focusNode: focusNode,
      backgroundCursorColor: Colors.yellow,
      cursorColor: Colors.red,
      style: const TextStyle()
    );
  }
}