如何将ColorPicker属性传递给根小部件

import 'package:flutter/material.dart';

class RootWidget extends StatelessWidget {
  final Color color;

  RootWidget({required this.color});

  @override
  Widget build(BuildContext context) {
    return Container(
      color: color,
      child: // 其他子部件
    );
  }
}

class ColorPickerWidget extends StatefulWidget {
  @override
  _ColorPickerWidgetState createState() => _ColorPickerWidgetState();
}

class _ColorPickerWidgetState extends State<ColorPickerWidget> {
  Color selectedColor = Colors.blue; // 默认颜色为蓝色

  void onColorChanged(Color color) {
    setState(() {
      selectedColor = color;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        ColorPicker(
          onColorChanged: onColorChanged,
        ),
        RootWidget(
          color: selectedColor,
        ),
      ],
    );
  }
}

class ColorPicker extends StatelessWidget {
  final ValueChanged<Color> onColorChanged;

  ColorPicker({required this.onColorChanged});

  @override
  Widget build(BuildContext context) {
    // 实现颜色选择器的UI和交互逻辑
    // 当颜色选择发生变化时，调用onColorChanged回调函数
  }
}

void main() {
  runApp(MaterialApp(
    home: ColorPickerWidget(),
  ));
}