One keybind re‑themes your whole desktop.

Pick a wallpaper and themely pulls the accent colour out of it, then recolours niri, your terminal, editor, browser, Discord and Spotify. Most apps change live, behind a circle that grows out of the wallpaper you picked.

Try it on this page:

Get themely on GitHub Read the setup guide

What follows the theme

niri: Borders and one opacity for every window
kitty and your prompt: Colours, opacity, the powerline prompt
GTK and KDE apps: Live, open windows included
VS Code and forks: Antigravity, VSCodium, Cursor
Firefox and Zen: Live, through Pywalfox
Vesktop: Discord recolours as you switch
Spotify: Through spicetify, with a quick restart
slat and btop: Running sessions recolour in place
flowbar, mako, fuzzel: The bar, notifications and launcher

Web pages keep their own colours, and apps with only built-in themes, like the official Discord client, can't be themed.

How a switch works

Press Mod+Shift+T and pick a wallpaper.A strip of your themes slides up over the desktop.
themely reads the wallpaper.It picks the most vivid colour that isn't grey or tiny, and derives the background, text and terminal colours from it. You can override the pick in the dashboard.
Every app changes behind a circular reveal.Configs are rewritten only between themely's marker comments, and each app is told to reload. Everything else in your dotfiles stays yours.

Install

git clone https://github.com/noturbob/themely ~/projects/themely
ln -s ~/projects/themely/themely.py ~/.local/bin/themely
ln -s ~/projects/themely/shell ~/.config/quickshell/themely
themely save --name "My theme" --wallpaper ~/Pictures/wall.jpg

You need niri, Quickshell, ImageMagick and swaybg. The setup guide covers the niri keybind, the marker lines and the one-time steps for each app.