ColorHUG, an inexpensive open source colorimeter, is a great little tool for calibrating a display and generating an ICC profile for it. But if you migrated to the latest version of Kubuntu featuring KDE Plasma 5, you might wonder how to install the existing ICC profile for your display. The easiest and quickest way to do that is to use the dispcalGUI application. You can install dispcalGUI using the Muon software center, or by running the sudo apt-get install dispcalgui command in the Konsole.
Once dispcalGUI has been installed, launch the application, press the Load Settings button next to the Settings drop-down list, and select the .icc file. Use then the Install Profile button to install the selected profile either globally or for the current user only. That’s all there is to it.