Do you have any links to the studies by those researchers? My own understanding is that yellow-on-blue is traditionally meant to be the most visible option, but that there's not actually a huge amount of evidence to back this up, and it's more tradition than anything else right now.
Too much contrast has never been an issue, which is why no one uses flux or dark themes, right?
f.lux is for increasing color temperature. Dark themes are for reducing the ratio of bright to dark. Neither is primarily intended for reducing contrast.
It's relatively easy, by turning #ffffff and #000000 both closer to #ff0000, or in other words, by reducing the contrast.
Dark themes (excluding amoled themes) exist to reduce the perceived contrast between the screen and the environment.
In both cases, either directly or indirectly, contrast is reduced.
Yes, but decreasing contrast is an unfortunate side effect, not the goal. This is like saying that the purpose of a light bulb is to increase your electricity bill.
> Dark themes (excluding amoled themes) exist to reduce the perceived contrast between the screen and the environment.
Yes, but not the contrast between text and background.