How to change the color of ttk button

Unfortunately, there isn't an easy way to change the foreground of a button from the ttk library. It is always the standard Windows gray like in your picture.

But you can easily get what you want with a normal tkinter.Button if you set the right options. Below is an example script:

import tkinter as tkroot = tk.Tk()btn = tk.Button(root,                 bg='#000000',                fg='#b7f731',                relief='flat',                text='hello button',                width=20)btn.pack()root.mainloop()

And here is what it will look like:

Also, the shade of green I picked was just an example one that I thought was pretty close to what you wanted. But you can specify any hex color code you want. If you need to turn a RGB value into hex, a simple trick is to use str.format like so:

>>> rgb = (183, 247, 49)>>> '#{:02x}{:02x}{:02x}'.format(*rgb)'#b7f731'>>>

Although it is not as simple as with Tk buttons, it is possible. In ttk, if you set the theme_use attribute to any of these: ('winnative', 'clam', 'alt', 'default', 'classic', 'vista', 'xpnative'), you should be able to modify the default behaviour. I set the "style.map" attribute to avoid background colour change due to mouse hover (The state of the button is always 'active').

import tkinter as tkfrom tkinter import ttk style = ttk.Style()style.theme_use('alt')style.configure('TButton', background = 'red', foreground = 'white', width = 20, borderwidth=1, focusthickness=3, focuscolor='none')style.map('TButton', background=[('active','red')])root = tk.Tk()button = ttk.Button(root,text='Quit')button.place(relx=0.3,rely=0.4)  root.mainloop()      

Hope this helps.

import ttkroot.style = ttk.Style()#root.style.theme_use("clam")style.configure('TButton', background='black')style.configure('TButton', foreground='green')button= ttk.Button(self, text="My background is black and my foreground is green.")

works for me if you want to change all your buttons to the one you "desire", with Python 2.7 and Tkinter 8.6