Hazel eyes are characterized by their unique coloring, with a mixture of brown, green, blue and gold. Individuals with hazel eyes have eyes that appear to be multicolored and may change, depending on lighting and what the individual is wearing.
Hazel eyes are considered to be semi-rare. It is uncertain what causes individuals to have hazel eyes, from both a biological and genetic standpoint. There is no standard eye color combination that can be characterized strictly as hazel; the variety of color mixture differs greatly from individual to individual. However, it can be noted that roughly 74 percent of individuals with hazel eyes have a characteristic brown or amber ring around the pupil.