If half of you morons who come in here dont have any good replies to post, then DONT POST. The way I see it, the threadstarter has a valid question to ask, and the morons who spam here are the ones who watch too much porn etc. To these people, let me just say, GTFO.

Anyway, to answer the question, I think the color of nipples has something to do with the melanin content of your skin, since it's been noted that fair skinned people tend to have lighter colored nipples (the better term is areolas) compared to darker people.

But having said that, even for a particular individual, the color of the areola can change from time to time, for example during pregnancy in women, or as a sign of disease.