![]() This effect can also happen with certain medications, such as opioids, which enlarge the pupils. When that happens, gray eyes can appear darker - though of course the eyes aren’t actually a different color. People with gray eyes may also note that their eyes seem to change color depending on the color of clothing (or eye makeup) the individual is wearing, or how bright the surrounding lighting is.Įven mood can appear to change the tint of gray, because pupils dilate (open wider) when someone is experiencing extreme emotions, such as grief or joy. The intensity of gray eyes depends on the individual. Gray eyes can appear in various shades, including dark gray, gray-blue, gray-green or almost hazel. ![]() Most of those genes help regulate melanin. Today scientists know this is not the case and that many genes play a role in how eye color develops. It was thought that if you inherited one gene for brown eyes and one gene for blue eyes, the gene for brown eyes would dominate and both of your eyes would be brown. Scientists used to think that a person’s eye color was caused by one dominant gene, and that darker eyes (like brown eyes) were dominant while lighter eyes (blue eyes, green eyes, hazel eyes and gray eyes) were recessive.Ī recessive gene only shows up when there are two copies of it present. Gray eyes are neither recessive nor dominant. ![]() “Gray” is simply the preferred spelling in American English, while “grey” is the British English spelling used primarily in the U.K.Ĭlick to read the article and view the infographic NOTE: You may see it referred to as a “grey eye” rather than a “gray eye,” but it’s the same eye color. Eyes with a lot of melanin are darker, and eyes with less melanin are blue, green, hazel, amber or gray. The color of the iris depends on the presence of a brown pigment called melanin, the same pigment that determines skin color and hair color. The pupil is an opening at the center of the iris that appears black, while the white part of your eye is called the sclera. The color and intensity of gray eyes varies from person to person and can include dark gray, gray-green and gray-blue.Įye color actually refers to the color of the iris, a ring of tissue that surrounds the pupil. Gray eye color is one of the loveliest and most uncommon, a trait shared by only 3% of the world’s population. Human eyes come in many colors - brown, blue, green, hazel, amber, and even violet or gray eyes.
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