My thought is to have mismatched, but coordinated, dresses. I hope you'll each choose a dress that you love that you know you'll wear again. Here are a bunch of pictures of ideas that you can use to guide you. The general palette idea is - Light colors, but more subdued than bright pastels. Champagne, neutralish pink, light yellow, ivory, light gray, etc. Solid or patterned is fine!
And here are some photos of what the other ladies have purchased:
And with that, here are my picks for dresses that I think will fit the theme, keeping in mind what Julie likes the idea of a pink or champagne colored dress:
What dress is your favorite? I'm liking the Banana Republic option (four) for re-wearability but woudl have to see it on a real life person. Also, I think the second Modcloth dress (five) would be a cheap way to fit the theme without investing much money.
Do you have a shopping dilemma you want some help with? I love tackling these questions because it feels like shopping and I don't spend any money. Send me an email and I'll give it a shot!