We AEPhis get no choice.
27 pearls, yellow gold, end of story. You can get a chapter guard that is pearl jeweled to match (which I did).
I love my pin and all that it stands for, and I like the idea that all my sisters have the exact same pin... at the same time, I would have liked white gold... I'd probably wear it more if it went with my other jewelry. And I'm envious of those of you who are allowed to wear your badges as pendants or rings...