When Do Kittens Eyes Change Color. However, kitten eye colour changes from blue to others within a few weeks after birth once their eyes start producing melanin. Most kitten’s eyes will change color as they age.

At the age of 6 to 7 weeks, a kitten's eye color begins to change. When do a kitten’s eyes change colour? At around 6 to 7 weeks of age, a kittens eyes may begin to gradually change color.