A gnome extension to desaturate and filter colors.
The code originates from https://github.com/amarovita/tint-all, with custom changes, bug fixes and port to new versions of Gnome.
To install the extension:
git clone https://github.com/let-def/colorfilter.git ~/.local/share/gnome-shell/extensions/colorfilter@def.lakaban.net
The extension adds a new palette-shaped icon 🎨 in the tray (upper-right corner of the screen). By default no effect is applied.
Click on the icon to cycle between different filters: red, green, blue, gray and sepia.
Use the mouse wheel on the icon to adjust the intensity.