[pictureofabear]

When I was a kid I noticed that if I laid on my side for a bit, the colors in one eye would be significantly red shifted.

I also noticed that closing your eyes for a while on a perfectly clear day, you could notice the blue tint on everything outside.

You also lose color vision when oxygen deprived (hypoxia). As oxygen returns, it returns beginning in the center of your fovia and expands outward like a jagged, slightly asymmetric ripple, color returning with it.