This is very strange. If you turn off the night mode in Windows, then it should turn off. Maybe your monitor is configured so that at night it turns off the blue color by itself so as not to" supposedly " harm your eyes. Although, if you sit at the computer at night and for a long time, then you are already essentially hurting your eyes, regardless of whether the blue color is disabled there or not. The yellow color is more pleasant to the eyes, but still, the monitor strains the eyes very much. It's good that the night lamp that I bought recently does not strain my eyes so much, because I'm already tired of how my eyes suffer... But nowadays everything is done through the monitor...