how to change tkinter's widget color on hover

change_color_on_hover.py

import tkinter


class ChangeColorOnHoverButton(tkinter.Button):
    """
    button class which changes its background color on hover 
    """
    
    def __init__(self, root):
        super().__init__(
            root,
            text="Change color on hover",
            bg="cyan",
            fg="black",
        )

        self.bind("<Motion>", self.mouse_on)
        self.bind("<Leave>", self.mouse_leave)
    
    def mouse_on(self, event):
        self["background"] = "cyan4"
        self["foreground"] = "white"
    
    def mouse_leave(self, event):
        self["background"] = "cyan"
        self["foreground"] = "black"


if __name__ == "__main__":
    root = tkinter.Tk()
    b = ChangeColorOnHoverButton(root)
    b.pack()
    root.mainloop()

mouse leave

on hover