如何在Tkinter上更改按钮和标签的颜色？

import tkinter as tk

window = tk.Tk()

button = tk.Button(window, text="按钮")
label = tk.Label(window, text="标签")

button.config(bg="red", fg="white")
label.config(bg="blue", fg="white")

window.mainloop()

import tkinter as tk

def change_color():
    button.config(bg="green", fg="white")
    label.config(bg="yellow", fg="black")

window = tk.Tk()

button = tk.Button(window, text="按钮", command=change_color)
label = tk.Label(window, text="标签")

button.pack()
label.pack()

window.mainloop()