I knew someone once who had the most lovely, strinkingly amber eyes - I saw them first in the sunlight and it was a very striking effect.
Perhaps not quite the same as orange but it is a possible eye colour.
https://en.wikipedia.org/wiki/Eye_color#Amber , https://en.wikipedia.org/wiki/Iris_%28anatomy%29#Amber_Eyes (which calls this colour "extremely rare" in humans).
I think it's a tiger or something. It doesn't have to be a person, necessarily.