A dark blue suit is a dark blue suit, but it's an adaptable garment. It seems a shame to just use it for work, weddings and funerals when you can really make it work for its living in a wide variety of ways. With the help of Hawes & Curtis I've styled a suit from their store in Jermyn Street in London to suggest how you can rescue yours from underuse.
The suit is made from dark indigo blue hopsack Super 120S wool cloth; slim cut and comfortable, it fitted off the peg with minor alterations, including adding turn-ups to the trousers. Remember, you don't have to wear yours as a suit all the time, it is two separate garments after all. The images below are to give you some ideas and inspiration:
All* the clothes and accessories are from the large Hawes & Curtis ranges of formal and informal wear and accessories. I'm very grateful to them for sponsoring this post and providing a photographer.
*Apart from the brown brogues and watch, which are mine.