A newborn's eyes may change color, depending on the amount of melanin in the iris. Caucasian babies' eyes may start out as dark-blue or gray, and then change color several times before the baby's first birthday. African-American, Asian and Hispanic newborns typically are born with dark-colored eyes that stay dark.
When a baby is born, melanin production is kick-started by light, which leads to eye-color changes. A little bit of melanin causes the baby's eyes to stay blue, whereas a little more causes a baby's eyes to change to green, hazel or gray. If there is a lot of melanin, a baby's eyes turn dark-brown or black.