I NEED HELP WITH MY MADRINA`S DRESSES!

I`m having my quince this year in October. My dress is gonna be made in Mexico, it`s all Turquoise with silver flowers on the top and around the bottom. I`m not having any chambelanes or damas because my parents want a small party at my house, I`m having just 4 madrinas and my padrinos de bautizo with me in the misa. It`s gonna be really simple.

Well, I don`t know what color my madrinas should wear! I mean, it`s hard to pick, and it can`t be white cuz my dress doesn`t have any white in it. I was thinking grey because my dress has silver but that`s gonna be hard to find unless they get their dresses made. Well, just let me know. If u wanna see kinda how my dress is gonna be (but with the colors I told u), This dress was the one that looked the most like the one I`m having made.

Http://www.arnettslaboutique.com/index.cfm?fuseaction=product.display&Product_ID=67