My husband and I are going to a ’ships ball’ (naval ball in other words), and I wanted him to wear his grey suit with a cream coloured shirt, not sure what colour tie yet, to go with my cream coloured dress. He has sent me an email with the dress code. This event is to be held in a casino, if that helps. Here is the exact phrasing:
Remember dress is black tie/formal therefore ladies are strongly encouraged to dress up to the hilt (cocktail dresses are suitable) and gents are to wear a tuxedo or dark suit with tie.
I can’t find anything on the internet which actually says whether grey is considered dark or not. It is a mid grey I suppose you would say, not a charcoal or dark grey.
Oh also it isn’t pin striped. I am aware pinstripes are for business suits only, that is about as far as my suit knowledge extends
As an edit, I would also like to know if anyone thinks it is even that big a deal if he wears grey. Its only a bunch of sailors, who will most likely all be off their faces 2 hours into the event anyway! Hahaha!

It’s a rock band and their suits just show their faces. The video has lots of confetti and may be in black and white. Thanks!