[honeychile]

Have you thought of possibly draping only one wall (the focus wall) in black, and the rest in either white or blue? Or vice versa - drape the room black, but the focus wall in white or blue?

If you do decide to use either blue or white dresses (especially the blue!), you might want to select three or four dresses from a catalog or website, and ask each sister to select her favorite. I've heard of one chapter which allots each sister however much fabric she needs for a dress, and she has one made to her liking. Obviously for that, the chapter buys the fabric from the same dye lot, to keep the color right. That just seems too expensive to me, though.