Mini-tip: Display Calibration in Linux

For half a year of using my laptop, I managed to notice that it was not the best monitor that was pushed into it. The screen is heavily blue in color, and working with even the simple design of sites can be very problematic. Especially when you see that the colors on the customer’s screen are not at all what you intended, or asked to make a designer by eye.

So, I decided to calibrate the screen. It turned out to be quite simple.
It is necessary in /etc/X11/xorg.conf in the section “Monitor” add a line of the form:

Gamma 1.25 1.15 1.06

Numbers in clear order mean Red Green Blue
This is quite enough for calibration by eye, after several restarts of the X-server.

There is also a xcalib utility that allows you to load calibration profiles created by third-party programs.