Have you thought about wearing coloured tights, such as opaque deep plum or slate or navy blue? When is the wedding? Is it indoors or outdoors? Those all will effect how dressy or casual you can make the accesories to the dress. I like some of the shoes you chose, esp the patent ones. I would go with a round toe pump though. It makes the outfit seem slightly more demure and sophisticated as opposed to "sexy". If you go with black tights, the black shoes with it will make your legs look longer. If you go with a deep colour i might wear bronze round toe pumps or find a pair to match the dress or the tights.