更改100%堆叠条形图绘制python中的颜色

import matplotlib.pyplot as plt

# 定义类别标签和各类别数据
categories = ['Category A', 'Category B', 'Category C']
data1 = [10, 15, 20]
data2 = [5, 10, 15]
data3 = [8, 12, 18]

# 绘制堆叠条形图
plt.bar(categories, data1, color='red', label='Data 1')
plt.bar(categories, data2, bottom=data1, color='green', label='Data 2')
plt.bar(categories, data3, bottom=[i+j for i, j in zip(data1, data2)], color='blue', label='Data 3')

# 添加图例和标签
plt.legend()
plt.xlabel('Categories')
plt.ylabel('Values')
plt.title('Stacked Bar Chart')

# 显示图形
plt.show()