It actually is. But it is super rare. Not a lot of people have it. But there ws this lady called Elizabeth taylor and she had really pretty violet esye. Her eyes were what she was mostly known for. But she pased away and none of her children inherited her eye color
Like Marilyn said, true purple eyes only occur as a result of albinism. Those with albinism usually have blue eyes; there are cases where there is so little melanin that the retina (which is red) can be seen, but there is enough pigment that the eyes appear purple. Also, those who have albinism or light colored eyes are more sensitive to bright light than those with darker eye colors, that's why there are usually an abundance of people with dark-colored eyes in places where the sun is more intense. :{B