A gray tabby cat with green eyes close up. This is due to the fact that there is less melanin mixing with pigment-producing pheomelanin. In people, only about 2% of the population are believed to have green eyes. And, of course, domestication brings along selective breeding and, with it, a broader range of cat coloration – including coats and eyes. Carmen Blázquez and Ismael Galván, in their abstract, Intraspecific eye color variability in birds and mammals: a recent evolutionary event exclusive to humans and domestic animals, most wild animals have a very limited eye color available within a species. That’s right somewhere in the domestication process of kitties sprang a rainbow-like range of eye colors. One interesting facet regarding the variety of colors that cat’s eyes possess comes from the most unlikely of sources: humans. Melanocytes, also found in the iris, control the color (the more there is, the darker the eyes will be). The more melanin, the more intense the color. The color is determined by two variables: hue and intensity.
Basically it’s all cellular: melanin and melanocyte activity. The color of a cat’s eyes has to do with a few factors within the iris. They may stay a variant of blue, turn a coppery tone, any shade of yellow, and of course, land on the spectrum of green. By 6 months old, their eyes should be their true color. Usually, at about 6 weeks old, cats’ eye color begins to change. When kittens first open their eyes, they are blue. The transition from somewhat to fully opened takes about two weeks. They live in a world of darkness for the first week to ten days of life. In the beginning …Īll cats begin life with their eyes sealed shut. There’s something so mystifying about cats with green eyes! Let’s find out more about these beautiful creatures with the verdant-hued peepers. Of the many flora and fauna that sport the color of money, few are as intriguing as our feline friends.
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