Using Nvidia binary driver 465.27 and disabled nouveau driver and default settings in nvidia control panel and bright panel.
The problem is that white color is very high how if OS is using an color settings.
Is how if all screen is using an color adjust that does white color to be an high bright level.
That not is changed using nvidia control panel or the bright panel.
I had posted in ubuntu forums in 06-2021
at moment not solution.
That issue happen much with games and not with videos.
Also is hard to use photo editor because the color not are correct.
Not problems with monitor or vga cable. Monitor not is the problem because had tested with another LCD monitor and happen the same problem.
Thanks for read my topic.