Install kcolorchooser by entering the following commands in the terminal:
sudo apt update sudo apt install kcolorchooser
Description:
color chooser and palette editor
KColorChooser is a color palette tool, used to mix colors and create custom color palettes. Using the dropper, it can obtain the color of any pixel on the screen. . A number of common color palettes are included, such as the standard Web colors and the Oxygen color scheme. . This package is part of the KDE graphics module.
Homepage: https://projects.kde.org/projects/kde/kdegraphics/kcolorchooser
Version: 4:17.12.3-0ubuntu1
Section: universe/graphics