How to know if my baby's eyes will change colour

Written by alison williams Google
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How to know if my baby's eyes will change colour
A baby's eye colour may change. (BananaStock/BananaStock/Getty Images)

Eye colour is determined by the amount of pigment in the iris. Before their true eye colour develops, Caucasian babies will usually be born with bark blue eyes. Those babies of African or Asian origin will have eyes of a dark grey or brown at birth. If a child is mixed race, the colour at birth could be dark blue, grey or brown. But this may change in the coming months.

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The pigment responsible for eye colour is called melanin. The amount of this pigment present in the iris is dependent on a person’s genes, so a baby’s eventual eye colour depends on the eye colour of their parents and the genes passed on from those parents. Some genes are more dominant than others, for example, if both parents have a blue and a brown gene, then their eyes will be brown as the brown gene is dominant over the blue gene. However, the baby could inherit both blue genes rather than the brown genes so could have blue eyes. If you and your partner are both brown-eyed, then the chances are that your baby’s eyes will eventually be brown. But if one of you has a parent with blue eyes, then your baby could well be blue-eyed too.

How to know if my baby's eyes will change colour
Eye colour is determined by genes. (Jupiterimages/ Images)


Melanin is responsible for eye, hair and skin colour. If you go out into the sun, then melanin will cause your skin to turn darker. This is what happens to a baby’s eyes just after birth. Before birth a baby is in the dark, but as soon as those bright lights of the outside world make contact then the production of melanin begins. A small amount of melanin and the eyes will be blue, a bit more and they can be hazel, green or even grey. Even more and you’re on your way to brown or even black.


Between the ages of six and nine months, you may see a dramatic change in the eye colour of your baby. This is because enough time has passed for melanin to build up in the iris. By now you can have a fairly firm idea of the eventual permanent eye colour but a child’s true eye colour cannot be completely determined until at least the age of three! However, the changes that occur will probably be subtle, hazel eyes may deepen to brown for example or green may become hazel. It is very unlikely that a blue-eyed child will suddenly become brown eyed!

How to know if my baby's eyes will change colour
Your child's eyes can change until age three. (Pixland/Pixland/Getty Images)


Heterochromia is a condition in which a person's eyes are different colours – one blue and one brown for example. This is rare and is caused by differences in the early stages of the development of the iris. It isn't harmful and is nothing to be concerned about.

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