Install sct by entering the following commands in the terminal:
sudo apt update sudo apt install sct
Description:
Set screen color temperature
sct is a small C program to change the screen color temperature. It can be used to reduce or increase the amount of blue light produced by the screen. . sct sets the color temperature of the screen via xrandr like redshift. Unlike redshift, it is only 80 lines of C and will not change the screen temperature automatically.
Homepage: https://github.com/Tookmund/setcolortemperature
Version: 1.3-1
Section: universe/x11