i had it intensely when i also developed other neurological issues like peripheral neuropaty, and palinopsia(afterimage)although symptom was temporary. now its more of a background if i concentrate hard enough i see snow. i had also had pretty bad RLS for several weeks.
I always assumed everyone saw it. I’m not special after all.
Though mine is gray, definitely not purple.
That gray is unique to individual. And if course has its German term. Similar to the other links floating about in this thread.
https://en.wikipedia.org/wiki/Eigengrau
i had it intensely when i also developed other neurological issues like peripheral neuropaty, and palinopsia(afterimage)although symptom was temporary. now its more of a background if i concentrate hard enough i see snow. i had also had pretty bad RLS for several weeks.