Not every dashing groom needs to wear brights. Mixing and matching neutrals is also an excellent way for a groom to show off his fashionista (or would it be fashionisto?) skills. This groom's natty tweed vest is very professor-chic. Paired with a pair of slim-cut khaki pants and a taupe tie, it looks refined, but casual. His wedding was set in Northern Ireland, and he blended in seamlessly with his surroundings.