Gpick is a free and open source color picker and color palette application for Linux. Using Gpick, you can sample any color from your desktop and also create beautiful color palettes. It comes with color scheme generator, text parser, create color palette from image, floating picker mode and many more. You can export your result to html, gpl, ase, mtl and css file formats and improt from gpl and ase. It is released under BSD 3-Clause License.
How to Install Gpick on Ubuntu Linux
To install Gpick on your Ubuntu Linux system, open the terminal software (ctrl+alt+t) and run below command. It will install the latest version of Gpick app on your system.
sudo apt install gpick
After the installation of Gpick, you can open it via the Show Apps Ubuntu dock menu or via below command in the terminal app.