Install xcolmix by entering the following commands in the terminal:
sudo apt update sudo apt install xcolmix
Description:
an RGB colour mixer
xcolmix enables you to mix your own colours in order to determine three values (the R/G/B code, or red-green-blue mix) of a colour. You can use those colours to, e.g., define the foreground or background of X applications which support it. Furthermore, xcolmix lets you retrieve RGB values from the X system's database of `predefined' colours.
Version: 1.07-10build2
Section: universe/utils