Tranparent

import tkinter as tk
import tkinter.ttk as ttk


class App(tk.Tk):
    def __init__(self):
        super().__init__()
        self.rowconfigure(0, weight=1)
        self.columnconfigure(1, weight=1)
        self.title('Default Demo')
        self.geometry('420x200')


def main():
    app = App()
    app.overrideredirect(True)
    app.wait_visibility(app)
    app.wm_attributes('-alpha', 0.2)
    app.wm_attributes("-topmost", True)
    app.config(bg='#00aaff')

    app.mainloop()


if __name__ == '__main__':
    main()