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 :)