A kitten's eyes open when he's between 7 and 14 days old. At first, every kitten has blue eyes. At about 1 month old, his eyes begin to change color. Usually, his eyes settle into their new and permanent color by about 3 months. However, the color may continue to intensify until as he matures.

A kitten's eye color is a gift of nature. Those hypnotic tones run the color spectrum from lemony amber to iridescent green to ice blue, and vary from kitten to kitten. Some kittens even have odd eyes; each eye is a different color, for instance an amber and a blue or a yellow and a green. Your kitten's eye color is genetically related to his coat color.