Driving in the car earlier this afternoon, I was listening to On Air with Ryan Seacrest, on Q94. Ryan brought up the fact that he was asked to be Man of Honor in an upcoming wedding and had no idea what to wear! (Paraphrasing) "The other bridesmaids are wearing aqua or peach, so am I supposed to wear an aqua or peach suit?"
I would say about 30% of the weddings I have executed and have coming up, have chosen to include a man of honor or best woman in their wedding party (unfortunately I don't have those photos yet!). I love that this is becoming more common and accepted as sometimes our best friends are of the opposite sex, and we would like to honor those friends!
So Ryan (and whoever else has wondered), to answer your question!
1) The bride (or groom) most likely has a vision for the aesthetic of her bridal party, so be sure to ask her if she already had an idea in mind! She might be able to bounce ideas around with you too.
2) You definitely don't want to clash with her partner so also check to see what they will be wearing.
3) Depending on the style and theme of the wedding, I would always advise wearing a pop of color that the other bridesmaids are wearing. Whether that is a peach colored tie, and aqua vest, some statement shoes, or a button down that matches the others! You're the man of honor and that's a special title! Don't be afraid to have a little pop ;-)
4) Flowers could be your friend! The bridesmaids most likely will have a beautiful bouquet, so wouldn't it be great to have a beautiful boutineer? Having an extravagant boutineer filled with lots of the bridesmaid's theme colors would not only pop, but tie you in with the group!
There are so many different ways that this can be played, and I love being able to be creative with my clients! If you were wondering about this question, I would love to bounce some ideas around with you!