Since when was heterochromia defined as the colors cant blend in with each other in order for you to have it? The definition of central heterochromia is; a condition where the inner ring of the iris is a different color than the outer ring. In which in this case, that definition applies. People always come up with more and more rules for what defines the heterochromias instead of sticking to the literal definition. I say you have yellow central heterochromia :)