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Rather, blue eyes result from structural color in combination with certain concentrations of non-blue pigments. The iris pigment epithelium is brownish black due to the presence of melanin. [54] Unlike brown eyes, blue eyes have low concentrations of melanin in the stroma of the iris, which lies in front of the dark epithelium.
Affected individuals typically have red hair, reddish-brown skin and blue or gray eyes. Variants may include rufous oculocutaneous albinism (ROCA or xanthism). The incidence rate of OCA3 is unknown. [14] [12] OCA4: 606574: SLC45A2: Is very rare outside Japan, where OCA4 accounts for 24% of albinism cases.
Naturally occurring red hair appears in a small minority of humans and is the rarest natural hair color, occurring in 0.6 percent of people. [2] A smaller percentage of humans, approximately 0.17 percent or 13 million, have a combination of red hair and blue eyes. [3]
What pigment combination causes hazel eyes, and really, how rare are hazel eyes? Parade is answering these questions and more. Related: The Rarest Eye Color in the World: What It Is and Why
By Susana Victoria Perez, Buzz60 If you think you have blue eyes, think again, they are actually tricking you! All eyes are really brown. According to CNN, Dr. Gary Heiting, a licensed optometrist ...
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Red hair, also known as ginger hair, is a human hair color found in 2–6% of people of Northern or Northwestern European ancestry and lesser frequency in other populations. It is most common in individuals homozygous for a recessive allele on chromosome 16 that produces an altered version of the MC1R protein.
Auburn hair is a human hair color, a variety of red hair, most commonly described as reddish-brown in color. Auburn hair ranges in shades from medium to dark. It can be found with a wide array of skin tones and eye colors. The chemical pigments that cause the coloration of auburn hair are often pheomelanin with high levels of eumelanin ...