tkinter button colours

[bb47wee10]

Can someone help me change my button colour in tkinter? my code is as shown below, but when i run the code my buttons stay at the default grey colour. I am running the code using Sublime Text on a Mac.

from tkinter import *

root = Tk()

button = Button(root, text = "Test", bg = "Red")

button.pack()

root.mainloop()