Eye color of the iris depends on the amount of melanin and the depth of its location. If the pigment is contained in the fourth and fifth layers, then passes through the iris colorless layers, it imparts eyes blue or blue color. If you have melanin in the layers of the front, the eyes are brown or yellow. If melanin in the front layers of the iris is unevenly distributed, the eyes are yellow-brown-blue, gray or green. Brown eye color is the dominant feature and in my case, it is common to all members of the family.