如何在TabBar中添加ColorTween动画？

import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart';

class MyTabBar extends StatefulWidget {
  @override
  _MyTabBarState createState() => _MyTabBarState();
}

class _MyTabBarState extends State<MyTabBar> with SingleTickerProviderStateMixin {
  TabController _tabController;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: 3, vsync: this);
  }

  @override
  void dispose() {
    _tabController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('TabBar with ColorTween Animation'),
      ),
      body: TabBarView(
        controller: _tabController,
        children: [
          // TabBarView的子页面
          // ...
        ],
      ),
      bottomNavigationBar: TabBar(
        controller: _tabController,
        tabs: [
          // TabBar的选项卡
          // ...
        ],
      ),
    );
  }
}

bottomNavigationBar: TabBar(
  controller: _tabController,
  tabs: [
    AnimatedBuilder(
      animation: _tabController.animation,
      builder: (context, child) {
        Color color = Colors.blue;
        if (_tabController.index == 0) {
          color = ColorTween(begin: Colors.blue, end: Colors.red)
              .evaluate(_tabController.animation);
        } else if (_tabController.index == 1) {
          color = ColorTween(begin: Colors.blue, end: Colors.green)
              .evaluate(_tabController.animation);
        } else if (_tabController.index == 2) {
          color = ColorTween(begin: Colors.blue, end: Colors.yellow)
              .evaluate(_tabController.animation);
        }
        return Tab(
          child: Container(
            color: color,
            child: child,
          ),
        );
      },
      child: Text('Tab 1'),
    ),
    // 其他选项卡
    // ...
  ],
),