I personally don’t think everything should be unisex. Yes, I believe pink is a feminine color. Can girls wear blue and still be girly? Absolutely. Can boys wear pink and still be manly? Why, yes.
However, all things being equal, I prefer pink panties to blue ones. That’s not to say that if I was given a sexy pair of lacy, blue tongas or bikinis, I’d throw them in the trash. Oops, there I go again. Lacy = feminine.
I think you’re overthinking this issue.