Your typical e-ink screen will be white when turned off. I think transflective LCDs too, or alternative display techs like https://daylightcomputer.com/
You can get monitors using those technologies if you don't want it to be black when off.
You can get monitors using those technologies if you don't want it to be black when off.
Thanks for the Daylight Computer link!
I imagine a black back on the screen improves contrast when it is on, as well.
Guess I’ll throw a nice colored cloth over the screen when it is off for now :)