Setting background color or bg for a button in Python Tkinter not working

Question

I'm new to tkinter and I can't set the background color of a button

My code:

from tkinter import *
from tkinter import ttk

root = Tk()
frame = Frame(root).grid(row = 0, column = 0)

button = ttk.Button(frame, text = "CLICK ME", bg = '#05752a').grid(row = 0, column = 0)

root.mainloop()

ERROR:

_tkinter.TclError: unknown option "-bg"