Tkinter widget class method configure and attribute bg or background could be used to set the Tkinter widget/window background color. Method configure(background= ) try: import Tkinter as tk except: import tkinter as tk app = tk.Tk() app.title("configure method") app.geometry("300x200") app.configure(bg="red") app.mainloop() Here, app.configure(bg='red') configures the background color of app to be red. You could also use background instead of bg. app.configure(background='red') Attribute bg or background background or bg is one attribute in most of Tkinter widgets, and could be used to set the background color directly.