ColorMate is a free and open source color converter application for Linux. Using ColorMate you can convert colors between all three CSS color format notations #rgb, rgb() and hsl(). It is a simple and easy to use application. It is written in Vala and released under GNU General Public License v3.0.
How to Install ColorMate on Ubuntu Linux
You can install ColorMate via flatpak package file from the remote flathub. First install flatpak and flathub and restart it after the installation. Follow below link for the installation instructions.
Now open the terminal command-line app (ctrl+alt+t) and run below ColorMate flatpak install command.
flatpak install flathub de.wwwtech.ColorMate
It will install the latest version of ColorMate on your system. Now open it using below command.
flatpak run de.wwwtech.ColorMate
And you can also uninstall ColorMate using below command.
flatpak uninstall de.wwwtech.ColorMate
sudo flatpak uninstall de.wwwtech.ColorMate