And OLED screens power consumption is proportional to how much color/white is displayed, so black uses less power. Good for your battery, and the environment too.
In a dark room or outside at night, black on an OLED is truly black and everything else floats magically in the void, it's a wonderful effect.
Back when we had CRTs where black also meant no light, you could have real dark in the room if you only had a terminal with green on black or white on black on the screen :)
In a dark room or outside at night, black on an OLED is truly black and everything else floats magically in the void, it's a wonderful effect.