Question about seeing Colors when your eyes are closed

Okay so when I was a lot younger, I remember closing my eyes and seeing multiple vivid colors swirling around. Now, all I see is white & black and sometimes I will see a color but it’s very vague(normally dark like pink or purple) but it doesn’t swirl or move. It stays in the same spot and will disappear in a matter of seconds.

Does anybody know ANYTHING related to this? e.g. the cause of it, downsides, upsides?

It’s a long known phenomenon called phosphene. Some people (me included) can make it a lot stronger by massaging their eyelids softly with eyes closed. Downsides? None that I know of. Upsides: FUN.

Thanks for the info, monstah :content: