Install kgamma5 by entering the following commands in the terminal:
sudo apt update sudo apt install kgamma5
Description:
monitor calibration panel for KDE
This package contains a settings panel for adjusting the brightness, contrast, and gamma-correction of a monitor. Test patterns are shown to help determine the settings that accurately display the full range of colors. . Each of the red, green, and blue components can be adjusted individually, or all three components can be adjusted together.
Homepage: http://www.kde.org/
Version: 4:5.12.4-0ubuntu1
Section: universe/graphics