The Far Races

Makmru
The Makmru have purple eyes that change between white, blue, red, and green depending on which element they're controling.

Haklaeoj
The Haklaeoj have turquoise eyes that change to pink, yellow, maroon, and silver depending on which emotion they're controlling.

Ekiqwu
The Ekiqwu have orange eyes that change between sky blue, sea green, gold, and peach, depending on what species they're controlling.

These are most discriminated against, due to their ability to control humanoids, mammals, fish/reptiles, and birds. Whoever they desire if their will is strong enough they can turn into a puppet. They generally get very sadistic and drunk on power because they have the ability to completely control creatures. And absolute power corrupts absolutely.

Ekiqwu also tend to turn that way because, though they are born with their powers, they don't emerge until they turn 17. They're buried inside maturing. The only way someone would know would be if they're watching their eyes at birth. Their eyes when they're born are the color they'll be at 17, and Makmru, Ekiqwu, and Haklaeoj can be born to parents who don't have those powers. And when they are, Ekiqwu are generally immediately given up for adoption, put into special "foster homes" (which are more like work camps really), or in extreme cases killed, because of the stigma surrounding them. Or they're raised with their powers being hidden from them and they've got normal childhoods with normal friends and stuff like that. But once their powers come out and their eyes change from whatever they normally are to Orange, they're immediately ostracized and hated.