如何从滑块设置flutter中的颜色？

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Color Slider Example')),
        body: ColorSlider(),
      ),
    );
  }
}

class ColorSlider extends StatefulWidget {
  @override
  _ColorSliderState createState() => _ColorSliderState();
}

class _ColorSliderState extends State<ColorSlider> {
  double _sliderValue = 0.0;
  Color _currentColor = Colors.red;

  @override
  void initState() {
    super.initState();
    _updateColor(_sliderValue);
  }

  void _updateColor(double value) {
    setState(() {
      _sliderValue = value;
      // 使用HSB模型来设置颜色
      _currentColor = Color.fromRGBO(
        (_sliderValue * 255).toInt(),
        255,
        255 - (_sliderValue * 255).toInt(),
        1.0,
      );
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Container(
          height: 100,
          width: 100,
          color: _currentColor,
        ),
        Slider(
          value: _sliderValue,
          min: 0.0,
          max: 1.0,
          onChanged: (value) {
            _updateColor(value);
          },
        ),
      ],
    );
  }
}