In System Settings -> Colors there is color panel but "calibrate" button is grey and I am unable to calibrate it by myself.


This feature requires a supported color calibration device that looks similar to a webcamera and attaches to the screen to detect the colors

This comment on How do I reset an ICC profile in Ubuntu? states:

sensor device - Example devices - Note though that you MUST check which ones are supported by ArgyllCMS, the software behind "Color" above.

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