Colour of an individual is basically determined by constitutional factors and these constitutional colours cannot be changed irrespective of what is done. In a newborn there is nothing much you can do regarding changing the colour and it is always not recommended to try too many things on sensitive skin of a newborn. So whatever natural changes in the colour of a newborn as it goes to the childhood and adolescence and reaches adult will have the natural set of changes. So the colour will obviously change. I will not recommend anything to be done in particular but skin in babies will be very sensitive. No oil massages is known to be very useful in affecting the colour of the skin.
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