One of the best ways to style out such a staple item as a blue waistcoat is to team it with grey dress pants. Let your outfit coordination savvy really shine by finishing your ensemble with a pair of black leather tassel loafers.
Grey Dress Pants with Blue Waistcoat Smart Casual Outfits
Dress in a blue waistcoat and grey dress pants if you're aiming for a neat, trendy look. For something more on the daring side to complement your ensemble, add black leather slip-on sneakers to your getup.