you can stare at the sun to be more productive when viewing the sun as well. /s

No, I don't buy the green screen argument, any more than the randomness of paper being somewhat white and ink being in contrast to that. Certainly white on black is useful in astronomy, the stuff you are interested in is lit. This article was such a wall of text, I don't know if it ever supported its conclusion very well, which is ironic for an article promoting "productivity".