U2720Q, eye strain

I have a Dell U2720Q monitor and have had severe eye strain. What seems to help is to set color from standard to the setting color space. And in color space check that the option sRGB is chosen. sRGB limits the amount of colors to what is standard for computers, including older devices. It seems that it was this wider color spectrum which caused me eye strain. The sRGB looks more dull and boring but immediately feels better on the eyes. I didn't get this display just for its awesome colors but largely for other reasons, so I can live with the trade off.

Then I have also activated night shift on my MacBook which is attached to this external monitor which limits blue light. But limiting the amount of colors in general as explained above seems to have more effect here. I want to underline that I made this change today, so I will know more about its effect later.