I noticed that my daughter is quite yellowish recently. I asked her endo and ped., both of them said it may be caused by the baby food.  I cut her Gerber food and cook regular table food for her. It helps.  I am light complexion while my husband is relatively dark complexion. My daughter used to be lighter but now is not so light as before. I do not know it is how she is or because she is under suppressed.