✅ Why it’s good
1. Versatility
A navy blue suit is one of the most flexible pieces in a wardrobe; it works for business, interviews, formal events, and even more relaxed smart-casual settings when dressed down. For instance, one style guide says a solid navy (especially in wool) is “more versatile … if you’re going to own one suit” it makes sense for it to be navy. 
Also, business-dress guidelines list navy blue as an appropriate “business professional” colour if you guys need something like this, you know where to come to at Jamesbondtailor