Change color of "tab header" in ttk.Notebook

Question

Gretings!

I want to change the color displayed in a tab header, created using ttk.Notebook. After search for a while I've found that to change the style of ttk widgets, we can use ttk. Styling, because Notebook apparently do not have configuration options to change its colors. However, I only found how to change the background and the foreground of a NoteBook object, but not how to configure the "tab header", whose background is either white (when selected) or grey (when not selected).

Anybody can help me with this?

This is the code that I have for now, related with what I'm trying to do

import Tkinter as tki
import ttk

...
##Other code. Not relevant here
...

#create tabs and associate the apropriate frames to it
tabs = ttk.Notebook(parent.master)
ttk.Style().configure("TNotebook", background=mainWcolor, foreground='green')   #configure "tabs" background color

paramsFrame = tki.Frame(tabs, bg=mainWcolor)   #frame with control parameters
comsFrame = tki.Frame(tabs, bg=mainWcolor)     #frame with communication parameters.
ssInfoFrame = tki.Frame(tabs, bg=mainWcolor)   #frame with start and stop messages and procedures

tabs.add(paramsFrame, text = "Control")
tabs.add(comsFrame, text = "Communications")
tabs.add(ssInfoFrame, text = "Start & Stop info")
tabs.pack()

Thanks in advance.

Answer 1

I had been using Oblivion's answer for some time, but I encountered an issue where the open/save dialog button outlines disappeared and Checkbuttons in Text widgets never appeared to be checked (even when they were checked). So, I translated the theme code into some style configuration and such to solve the problem (it solved it). This will let you change the tab bar color, the tab background/foreground and the active tab background/foreground. Plus, it won't cause issues with the rest of your chosen theme. It's essentially the same code from the theme translated over. So, really, Oblivion deserves most of the credit.

Style().configure("TNotebook", background=myTabBarColor);
Style().map("TNotebook.Tab", background=[("selected", myActiveTabBackgroundColor)], foreground=[("selected", myActiveTabForegroundColor)]);
Style().configure("TNotebook.Tab", background=myTabBackgroundColor, foreground=myTabForegroundColor);

Edit: Apparently, this solution doesn't work in Windows. I tested it in Linux (a number of versions of Xubuntu).

Answer 2

I'm a begginer in python, tkinter. I had these style problem by my App too. This worked by Treeview style and now checked by the Notebook, it works so fine for me using windows .... theme_use, configure, map.

noteStyle = ttk.Style()
noteStyle.theme_use('default')
noteStyle.configure("TNotebook", background=clr, borderwidth=0)
noteStyle.configure("TNotebook.Tab", background="clr", borderwidth=0)
noteStyle.map("TNotebook", background=[("selected", clr)])

Answer 3

change the color of a Tab header: when selecting a tab header. when upon hovering over a Tab header. removing the dotted line around the text in a tab header.

from tkinter import *
from tkinter import ttk

root = Tk()
#background color
color='#21252b'
root.configure(background = color)
root.resizable(False, False)
#Notebook color
sky_color = "sky blue"
gold_color = "gold"
color_tab = "#ccdee0"
#style
style = ttk.Style()
style.theme_create( "beautiful", parent = "alt", settings ={
        "TNotebook": {
            "configure": {"tabmargins": [10, 10, 20, 10], "background":sky_color }},
        "TNotebook.Tab": {
            "configure": {"padding": [30, 15], "background": sky_color, "font":('consolas italic', 14), "borderwidth":[0]},
            "map":       {"background": [("selected", gold_color), ('!active', sky_color), ('active', color_tab)],
                          "expand": [("selected", [1, 1, 1, 0])]}}})
style.theme_use("beautiful")
style.layout("Tab",
                    [('Notebook.tab', {'sticky': 'nswe', 'children':
                        [('Notebook.padding', {'side': 'top', 'sticky': 'nswe', 'children':
                            #[('Notebook.focus', {'side': 'top', 'sticky': 'nswe', 'children':
                                [('Notebook.label', {'side': 'top', 'sticky': ''})],
                            #})],
                        })],
                    })]
                 )
style.configure('TLabel', background = color , foreground = 'white')
style.configure('TFrame', background = color)
#frame
frame_main_notebook = ttk.Frame(root, width = 200, height = 100)
frame_main_notebook.pack()
#note book
main_notebook = ttk.Notebook(frame_main_notebook, width = 200, height = 100)
main_notebook.pack(side = TOP, expand = 1, fill = 'both')
#first tab
frame_one = ttk.Frame(main_notebook, width = 200, height = 100)
frame_one.pack(side = TOP)
main_notebook.add(frame_one, text = '    tab one    ')
ttk.Label(frame_one, text = "this is inside of tab one").pack()
#second tab
frame_two = ttk.Frame(main_notebook, width = 200, height = 100)
frame_two.pack(side = TOP)
ttk.Label(frame_two, text = "this is inside of tab two").pack()
main_notebook.add(frame_two, text = '    tab two    ')
    
root.mainloop()