Most contracts stipulate that the photographer owns the rights to all photos taken at the wedding, even the ones of you. In other words, the photographer can use them promotionally (on their website or blog, submit them for publication and even place them in ads). That also means you can't just post the digital proofs they send you—most photographers have a policy that you can only share watermarked images or images with their credit on them. Also, unless you negotiate otherwise, if you want to print the images yourselves or order an album from another source, you'll have to buy the rights to the images.
When styling a photo session, I like to start out with a basic color palette and go from there. It can help to have one “rock star” in the photos who carries a pattern in their outfit that the rest of the group’s clothing or accessories pulls from, while keeping everyone else’s outfits more simple. You can do this with a neutral and a few colorful brights, or try a softer palette that has different tonal ranges of the same shades.