如何使用patches.PathPatch指定矩形的颜色列表？

import matplotlib.pyplot as plt
from matplotlib.patches import PathPatch
import numpy as np

# 创建一个图形和轴
fig, ax = plt.subplots()

# 定义矩形的顶点坐标
rects = [
    [(0.1, 0.1), (0.3, 0.3)],
    [(0.4, 0.4), (0.6, 0.6)],
    [(0.7, 0.7), (0.9, 0.9)]
]

# 定义颜色列表
colors = ['red', 'green', 'blue']

# 绘制每个矩形
for (x1, y1), (x2, y2) in rects:
    # 计算矩形的四个顶点坐标
    verts = [
        (x1, y1),
        (x2, y1),
        (x2, y2),
        (x1, y2),
        (x1, y1)
    ]
    # 创建 Path 对象
    path = plt.Polygon(verts, closed=True, edgecolor='black')
    # 创建 PathPatch 对象并添加到轴上
    patch = PathPatch(path, facecolor=colors.pop(0))
    ax.add_patch(patch)

# 设置轴的范围
ax.set_xlim(0, 1)
ax.set_ylim(0, 1)

# 显示图形
plt.show()