Brown eyes are dominant because they do not reveal any genetic disorders. Brown eye color is recessive to blue and other colors, so all brown-eyed people can be presumed to have two copies of the gene for brown eyes and hence cannot come from a breed that carries the genes for both blue and brown eye color. Thus, all healthy humans must have one version of the gene that yields dark-pigmented collagen, while those with light-colored eyes must carry one copy of two different alleles. This means that their children will very likely end up with either dark-colored or light-colored eyes, but never both. Brown eyes are superior beause they're sensitive to more light wavelengths (meaning that your pupils dilate in response to more brightness). While also absorbing warmer colors like yellow and orange. This unique combination makes it easier for you to see at night or in foggy weather when other people aren't able to see without adjusting their focus, thanks to trichromatic color vision (which allows them to distinguish between different shades). The blue pigment found in some brown-eyed individuals is known as melanin; it helps protect the retina from damage due to ultraviolet light exposure or an unhealthy diet.