I'm going to a wedding of two very stylish friends and was thinking it would be a good opportunity to wear my tuxedo instead of a suit and tie. I plan on wearing a shawl collar black tuxedo and was also planning to wear the matching black bow tie. However...should I be wearing a different color bow tie? I'm not in the wedding - would it be odd to go "that formal"? Should I instead go for a non-black bow tie? What is the etiquette here?