Why you should have a black background.
Consumes less power / battery
If you have a black background, the black pixels are automatically switched off with oled, so you can save battery.
This can be very good if you are outside for a long time and you don’t can charge your phone somewhere.
Then you walk on the street and an accident happens because you didn’t saw anything…
Actually it saves your life!But if you don’t have an oled display, you can still do something to save battery.
Get a powerbank, which can be used to recharge your device several times!