Sometimes it’s actually better with dark background on direct sun.
If we are talking about devices screen, white background kinda goes yellow on direct sun and contrast reduces. But black background goes dark grey and less light gets reelected back to the eyes.
If we are talking old school paper ( SHOCKING i know ). It’s close to unreadable on direct sun when paper is white because it shines back too bright, it hurts eyes but black paper it much more comfy on eyes.
Note: Reason why black on white was used historicaly is most likely economical. (Less paint, easy to maintain.) If papyrus naturally turned black, all written text might have been in “dark mode” from the beginning.
Sometimes it’s actually better with dark background on direct sun.
If we are talking about devices screen, white background kinda goes yellow on direct sun and contrast reduces. But black background goes dark grey and less light gets reelected back to the eyes.
If we are talking old school paper ( SHOCKING i know ). It’s close to unreadable on direct sun when paper is white because it shines back too bright, it hurts eyes but black paper it much more comfy on eyes.
Note: Reason why black on white was used historicaly is most likely economical. (Less paint, easy to maintain.) If papyrus naturally turned black, all written text might have been in “dark mode” from the beginning.