NASA should hire you to classify alien landscapes.
14 or 15 out of 15. The last rounds had color differences of ONE PERCENT and you still caught them. This is either genuine superhuman color perception or you turned your screen brightness to maximum and squinted really hard (valid strategy). If this is real, your visual cortex is processing color at a level that most humans cannot achieve. You see the world in more colors than the rest of us. That's beautiful. It's also probably annoying because everything slightly off-shade bothers you.
Get your read — free on iPhoneeither your eyes are superhuman or you got lucky. either way — you see things the rest of us are blind to.