Weddingbee boards

We want the guys to be wearing dark gray suits (kind of a charcoal), but if we can't find them to rent, we'll end up going black.

I've fallen in love with a few inspiration boards that have bright and burnt oranges paired with pale yellows.

However, I have three lovely white girls as my 'maids, and I hate the thought of putting them in orange - I just can't see it being universally flattering. Also, I'm a little afraid that the dark suits paired with orange dresses would look to halloween-y.

So what color dresses would look work well for relatively pale caucasian women (one redhead and two dirty blondes) that I could pair with orange (or yellow, I guess) accents?

PLEASE no black (again, I'm afraid of looking like halloween - especially in early October), and I think dark brown would look bad with the gray suits.

I hadn't considered yellow; I'll ask them what they think of it. Thanks!