Rachel Weisz, was raised Jewish.
Although her mother is from Austrian and Italian Jewish descent (and that makes Rachel Jewish, as the mother is the one that counts), and her father is a Hungarian Jew, it looks like she is not an observant Jew.
It appears that at least one individual is interested in the colour of nippers.
Unless an individual is a very fair and natural blonde Caucasian, it is unlikely that her nipples will be pink. If the individual's eyebrows and eyelashes are blonde, then her nipples are more likely to be pink. This also applies to the female genitalia.
p.s. my wife is a natural blonde and has green eyes.