Question for dark women update

I feel real stupid coming out and asking this but here it goes. I am white. I'm German/Croatian/Polish mix. All my white girlfriends growing up had pink nipples. My nipples have always been a tan color, almost brown but not too dark. Which I love, I think it's sexier than pink nipples. When I get pregnant or sometimes during my period my nipples darken. But Instead of turning a darker brown, they turn purple! 🤔 for those of you with dark skin (I say this because you have brown(ish) nipples also) and have experienced darkening nipples due to pregnancy, etc., do your nipples turn a darker brown or what? I've never heard of purple nipples before. My lady bits are also dark and not pink like the rest of my white friends. Wtf. Would really like some input here. I live in the Caribbean girls so I definitely am not a racist please don't think that way. I'm sincerely concerned about my purple titties 😂