as a dark mode enjoyer, as I grow older I found that I prefer not pure black for the background, and not pure white for the text. sometimes google did well in the case of material UI guideline in the beginning. they set that the background is almost black gray and the text some kind of offwhite IIRC. Back then I disliked it but now I understand the decision.

if a website or app is designed with dark mode in the first place I found that it is a lot more calming to me to look at it a long time. although for eink and similar technology displays, I still prefer traditional black text In white.

I can read black on white text but it hurts my eyes immediately and will sting for maybe a couple minutes afterwards. It doesn't have to be AMOLED — grey or dark beige or amber or whatever can work — so long as it isn't really bright.