I just ran across this colorful site, The Perfect Palette. Like Colormusing (with me as the chief muse, of course), they produce color palettes, but they specialize in developing color palettes and themes for weddings.
On this site, you can browse existing palettes, or request a custom palette. They even have a page called “Shop the Color”, where you can find examples of, say, dresses, in the colors you like, and by mousing over each image, find the price immediately (or click on the image to go directly to that item’s website for purchasing). All in all, it’s a very interesting and useful site, well worth the trip— before you head down the aisle!