I like the idea of all different bridesmaid dresses but a cohesive color scheme. Yours would definitely be a little more rustic, soft natural fabrics, and more country in a dusty cornflower blue theme. I think they should all be above knee length.
We're saluting Duchess Kate Middleton and going with white bridesmaid dresses. Its classy and we think it's hilarious and ironic that a bunch of vamps will be channelling angels in white dresses. They can all be different, too, as no supe is the same!