hmm...i too have had this experience, mostly purple  and white but what im really interested in is everytime i close my eyes ever since i was a little girl i saw these black and white spiralling...things. Its just like black whirling "blankets" (as my friend called them because she sees them too) and then a white one will come and join...its hella weird. Does anyone have any information on this? I didnt want to start another thread because theres not enough for me too say so im hoping this thread was okay to intervene in.
Also i was wondering about something else. I know someone who says that when she closes her eyes she sees an eyeball in the corner of her eye and when i was younger i used to see this. Is it just seeing a "reflection" of your eye or what?

Carpe Noctum

In my opinion, we can see different lights if we need to clean and fill any ernergy center with prana (or qi). Seeing a lights is very individual and we dont have to concentrate on that. When all centers are optimized we can feel unity with all universe and we cant describe a special light... all is beutiful and joyful