The sharpness drops away really fast, so you can really imagine the actual focused FOV as a narrow beam when projected. Also, you don't really just "stare" at something, unless it's far away. For objects of interest that are larger than 1-2 degrees in your FOV, your eyes will have to move a lot, really fast, to continuously scan it. You don't notice your own eyes moving, though. See https://en.wikipedia.org/wiki/Saccade.
(Also, what you "see" is in large parts made up by fusing the "real" visual input with knowledge and expectations you have in your head.)
It indeed seems I have much better peripheral vision than most people, so you might be right. As I wrote in the other post, I have tested that I can definitely see color in my peripheral vision.
Random color generator. The precision goes down on the far periphery, (the colors usually look more saturated than they are), but the basic color is right. In near-mid periphery (~45°), the colors seem normal.
Good work. Have you included randomised brightness to avoid accidentally learning the difference between what the computer thinks is constant brightness and what your eyes respond to constantly? (Such as “green seems brighter than red”)?
If it had been HSV(rand, 1, 1), which you didn’t do, I would anticipate accidentally learning to map subjective brightness to hue. But you avoided that entirely, so no matter :)
(Also, what you "see" is in large parts made up by fusing the "real" visual input with knowledge and expectations you have in your head.)