Beautiful girls with blue eyes
Even though there are different eye colors, including less common blue eyes and green eyes, there is only one type of eye color pigment. The amount of this pigment (called melanin) present in the iris of your eye determines the color of your eyes. Eyes with very little melanin in the iris are blue. Eyes with a bit more melanin are green, hazel or light brown. And those with a high concentration of melanin are medium or dark brown.

Eye color is an inherited trait. But predicting eye color from your family tree is more difficult than you might expect. In fact, there is evidence that up to 16 genes can influence eye color. So it's very possible for children in the same family to have different eye colors, and eyes that are not the same color as those of their parents. Due to complex variations and interactions of genes, it's hard to say with certainty what color eyes a child might end up with. Also, the eyes of many Caucasian babies contain very little melanin at birth and will appear blue the first few months of life. But within 12 to 18 months, more melanin can accumulate in the iris, causing eye color to change from blue to green, hazel or brown.
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