Standard human eyeballs. They work.
Your color vision is perfectly normal. You can tell red from orange and blue from teal like a functioning human being. The harder rounds stumped you but that's expected — those color differences are genuinely tiny. You have standard trichromatic vision which means three types of cone cells doing their thing. Nothing exceptional, nothing concerning. Your eyes are regular eyes and they're doing their job. Good eyes. Normal eyes. Fine eyes.
Get your read — free on iPhoneyour eyes work exactly like most humans — functional, unremarkable. the question is whether you're paying attention to what they show you.