I have kinda bad night sight, and recently went to some parties where more or less everyone was wearing black I couldn't tell where person a ends and person b begins most of the time.

sounds like a techno party working as intended!

For a kinky tech party where touchy without consent is a big no-go I would rather describe it as contra productive.

there was an article somewhere claiming that all beige/neutral colors are bad for infants, they need color stimuli to develop their sight or sense of color.