Sun Valley ttk theme

Make your Tkinter application look better than ever with just two lines of code!

Installation

The theme is easily installable as a Python package

pip install sv-ttk

Usage

Note

The theme will only be applied to themable (tkinter.ttk) widgets, and not with the regular Tkinter widgets, they only benefit from the colorscheme.

For detailed documentation, visit the wiki page.

import tkinter
from tkinter import ttk

import sv_ttk

root = tkinter.Tk()

button = ttk.Button(root, text="Click me!")
button.pack()

# This is where the magic happens
sv_ttk.set_theme("dark")

root.mainloop()

Tips and tricks

Our intention is to keep the sv-ttk package as simple as possible, while making it easy to integrate with other libraries.

Set the theme to the system theme

You can use the darkdetect package to detect the system color scheme. Here's an example:

import darkdetect

sv_ttk.set_theme(darkdetect.theme())

It's only a matter of an extra import and passing the result of darkdetect.theme() to sv_ttk.set_theme(). It's that easy!

Dark mode title bar on Windows

The Sun Valley theme doesn't change the title bar color on Windows when the theme is set to dark. You can use pywinstyles to achieve this. Here's an example:

import pywinstyles, sys

def apply_theme_to_titlebar(root):
    version = sys.getwindowsversion()

    if version.major == 10 and version.build >= 22000:
        # Set the title bar color to the background color on Windows 11 for better appearance
        pywinstyles.change_header_color(root, "#1c1c1c" if sv_ttk.get_theme() == "dark" else "#fafafa")
    elif version.major == 10:
        pywinstyles.apply_style(root, "dark" if sv_ttk.get_theme() == "dark" else "normal")

        # A hacky way to update the title bar's color on Windows 10 (it doesn't update instantly like on Windows 11)
        root.wm_attributes("-alpha", 0.99)
        root.wm_attributes("-alpha", 1)

# Example usage (replace `root` with the reference to your main/Toplevel window)
apply_theme_to_titlebar(root)

Note that on Windows 10, due to its limitations, you can only set the title bar's color to black for dark mode and white for light mode. On Windows 11 the title bar can be set to any color.

Warning

The apply_theme_to_titlebar works on Windows only, so you should check whether the platform is Windows before calling this function.

Here's how the windows look after calling set_title_bar_color():

Screenshots

Windows 10


Windows 11

Wanna see more?

Check out my other ttk themes!

• The Azure ttk theme
• The Forest ttk theme