Automatic switch based on white detection

[Comawhite54]

Hello, would there be a way to read the current display and analyze it this way:

If the center of the screen is white/bright, then switch ON, toggle /OFF/ON.

Or if more than 50% of the screen is bright colored. (maybe not scan the whole screen but just a large square in the center would be more relevant I think).

This is because some apps are already in Dark mode.