Okay, it probably isn't octarine (or maybe it is), but have none of you experienced what I'm talking about? - that everpresent undescribably colour you perceive after ingesting a large quantity of magic mushrooms, ... or lsd....?? The curious thing is that once you notice it, you realize you've been seeing it all along, but have just been filtering it out...
P.s. I haven't had either of these substances for many a year... but I can still percieve this 'exotic colour' if I go into a meditative state with my eyes open and the lights off. It's not alien... this colour and it's permutations were common even when I lay awake at night as a kid. Don't any of you relate to what I'm talking about?
=~. O =
There is something which I take to be a kind of image noise. More visible when it's completely dark and/or when my vision is failing (it does sometimes for whatever/different reasons {I guess: low blood pressure, not enough eaten, not enough drunk, too hot}. Yesterday I had it pretty badly, first I started to feel a little bad, I had just rode my bike for 15km in the heat, felt thirst though I had just drunk half a litre. Then I needed to sit, my vision started to darken and contain more image noise, I felt a kind of pressure on my ears and stuff sounded a little less loud and not exactly like it should. A few minutes later I was perfectly fine again, no thirst anymore, I guess the water I had previously drunk had arrived where it was needed. Came and went gradually, over the course of those few minutes).That noise varies color quite a lot, "purple / blue / pink" sounds about right. Pretty dark.
But it doesn't enhance other colors, it blocks them, it's there instead of them, not with them. It forms lots of little dots with different forms; round, slightly blurry edges.
Now that you make me think about it, there also other imperfections of my sight, some of which could match what you are describing.
There is another kind of thing where there are bigger areas (of various forms; fading off at the borders) with a slightly wrong hue (in similar colors), they can be just random, but tend to form more around real things. For example when I blankly stare at this screens, it forms a kind of halo around the post buttom. When I look the right way that stuff goes away, I guess my brain does some post-editing to get rid of it (maybe it's artifacts of it's image processing in the first place, maybe problems with the {calibration of?} light sensing cells in the eyes, maybe something else).
And a little bit of image noise of various colors (all of them, I would say) is just always visible, my brain usually ignores it so good I don't see it anymore, but when I try to it becomes visible.
I guess most of that stuff should be documented somewhere, have you looked it up, FaeMinx, to try and find whether other people see that kind of stuff too?