Gradience is a free and open source Libadwaita and Adwaita theme customizing application for Linux. Using Gradience you can change every color in the libadwaita theme and adw-gtk3 theme in your system. Like accent, destructive, success,warning, error, window, header bar, card, dialog, popover and more. You can also apply material design 3 colors and custom GTK4 and GTK3 CSS. It is written in Python and based on GTK4 and libadwaita. It is released under GNU General Public License v3.0.
How to Install Gradience on Ubuntu Linux
Gradience is available as a flatpak package file from remote flathub repository. First install flatpak and flathub on your system and restart your system after the installation .
How to Install Flatpak and flathub
Now in your terminal software (ctrl+alt+t) run below Gradience flatpak install command.
flatpak install flathub com.github.GradienceTeam.Gradience
After the installation run this command in terminal to start Gradience app.
flatpak run com.github.GradienceTeam.Gradience
You can also uninstall it using
sudo flatpak uninstall com.github.GradienceTeam.Gradience