Question about Zoe
Why is her right eye purple and her left eye is blue ?
Why is her right eye purple and her left eye is blue ?
Well she is the aspect of twilight and twlilight is very often seen as a mix of darkness and light(or the day and the night),so she has 2 eye colors,with one eye representing light/day and the other night/darkness.
Heterochromia
Because they decided to draw her that way
It's Heterochromia, it's a rare, but natural discoloration of the same eye color.
Because diversity? I can't remember any champion have it except Rengar and It is not even heterochromia technically.
It looks cool, we haven't had it. Not much to say.
Evolution.
Probably what GreenLore said, but I would add that another reason they are different colors is because of her playfulness and silliness.
I am guessing the designers were underpaid and working overtime so they decided to do some trolling in return.