Eye colors can range from the most common color, brown, to the least common, green.
Amber Eye Color
Amber eyes are of a solid color and have a strong yellowish/golden and russet/coppery tint.
Blue Eye Color
Blue eyes have low concentrations of melanin in the stroma of the iris, which lies in front of the dark epithelium.
Brown Eyes Color
Dark pigment of brown eyes is most common in East Asia, Southeast Asia, South Asia, West Asia, Oceania, Africa, Americas, etc. as well as parts of Eastern Europe and Southern Europe.
Gray Eye Color
Gray eyes have a dark epithelium at the back of the iris and a relatively clear stroma at the front.
Green Eye Color
Caused by the combination of an amber or light brown pigmentation of the stroma, given by a low or moderate concentration of melanin, with the blue tone imparted by the Rayleigh scattering of the reflected light.
Hazel Eye Color
Hazel eyes are due to a combination of Rayleigh scattering and a moderate amount of melanin in the iris’s anterior border layer.
Red and Violet Eye Color
The eyes of people with severe forms of albinism may appear red under certain lighting conditions owing to the extremely low quantities of melanin,allowing the blood vessels to show through.