There is a lot of debate out there about what a photographer should wear to a wedding. While I don’t think there is a “one-size fits all” uniform, I am a people watcher and I have seen couples (and read Bride forums) that clearly stated their opinion.
A good rule of thumb is to choose dark, neutral colors when possible. Many go with the standard black, but I’m not really a black slacks person. I have them and I wear them, but I will almost always choose my navy dresses or slacks over my black any day.
Still going with the dark, neutral colors, I would make sure they are non-slip and comfortable shoes. I’m always looking for my next pair of “comfortable shoes”, but I really don’t think they exist for women (or men, Chris has been searching for years). I would also suggest shoes that don’t make noises. It makes being a ninja a lot easier.
This is the one that I would assume couples have a problem with. Please wear something that will either blend you into the background (ie. black) or something you’d wear to a wedding. I’m not saying you have to wear a tux or a suit, cocktail dress or ball gown, but for heaven sake, don’t show up to a black tie wedding wearing a white v-neck undershirt with a tan leather vest over it with jeans. Consider your clientele, ask them the attire of their wedding. Even a nicer polo is better than the v-neck and jeans.