Hi All,
Our wedding is very casual and relaxed. I am wearing a full length gown but is't very simple and I will be wearing my favorite pair of Rainbow brand flip flops. It's an outdoor morning ceremony with a brunch to follow in the mountains.
I feel that wearing a suite may be too formal and I like the idea of just a cool vest and tie.
That being said, I still feel like it might be best for him to stand out a little from his best man. So should the best man wear a tie only? Or a different color shirt or vest? They are both wearing a brown tweed/wool pant that has small flecks of ivory, green and rusty red color. My dress is ivory.
I plan on there shoes being a modern square toe brown shoe or a fun, rust or green sneaker. Still haven't decided. 
I need style and color suggestions.