The normal color of a woman’s nipple is pink, but there is also a darker dark brown color, which is a common nipple color. Women enter puberty after the body’s estrogen secretion, stimulate breast development, areola and nipple color deepening, dark brown. If a girl’s nipple color further darkens and blackens, she needs to go to the hospital in time for a checkup first. It may be that the girl’s body has a problem and there is no lesion, or it may be that the girl’s nipples are enlarged and discolored due to the increase of estrogen in the body caused by eating estrogenic foods. It is possible to normalize the level of estrogen through self-regulation, and the color of the nipples may slowly become lighter. There are also genetic reasons for nipple color. Some people who inherit a light skin color may have reddish-brown nipples, while others may be dark brown.