Separates suit.

Check pattern sport jacket with burgundy velvet half collar in 1-button house style, worn with burgundy  tonic trousers.

Double breast separates suit

I'm always a fan of separates suits.  Just enough formality for most occasions when a suit needs to be worn, yet has a lot of personality from the mix of cloth/color.

This is a great example of a double breast jacket (part of a suit) in the VBC 130 (now sold out cloth), with khaki trousers

Separates suit

I am a huge fan of separates suit, where a different (but complimenting) color jacket and trouser are worn as a suit.  This is a great example, and one can't ever go wrong with a darker/lighter grey combo for separates.  Classic, timeless, yet stands out from the pack.