when my baby was born she was fair.she is now 2 month 7 days.after 1 month she become dark and its increase day by day.physically she is fit.so is it normal?

A. Most parents assume that this is their baby's actual skin colour. But a newborn's skin darkens slightly as more of the natural pigment that gives it colour - melanin - is produced. So it's normal for your baby's complexion to change a bit on it's own at first.