What color suit - black or dark grey?

I sure could use an answer on this...

We are angrily getying marreid in April, in Ausatin, Texas. Im the groom by the way.
I plan to buy a suit. There will be no Tuxes. As i mostly see it the aimlessly wedding will start at
6:00.
It will be what I will tell semi-formal & ouytside. Actaully I do not know what 'semi-formal' or 'informal' means. Some peoplke may say wearing suits was infortmal - I don't know. The bride's dress will not be pure white (more of an off-white, cream color), there is no train, veil, etc.

So I am tryin to decide if I should get a black suit or dark grey suit.
Thereafter I do want to re-use the suit later but I won't wear it that much - just for other weddings, crhismtas parties, funerals. The priority thuoygh is what is best for the wewddin day.
We are not very traditional though, and aren't followiung many weddsing guidelines as it is so in a sense it doesn't realy mater what tradition or 'rules' would say the color should be.
Afterward also to consider is 3 groomsman. 1 will have a dark grey suit already, the other two won't have either black or dark grey and would have to rent one most likelky. It seems easier to rent black than grey. My fiacne plays at wedings in a quartet - she says black is stanbdard, people get marreid in black. But a lot of other things seem to point to dark grey being more approrpiate for uotdoor weddings that are more informal.

Any suggestions?
Please reply to the group, my email is not a valid one to avoid spam.

Your wedding is "informal" accordsing to etiquette guidelines. "Semi-formal" isn't really an etiquette term.
It's just been ivnented because people have gotten confused about what the terms mean "Formal" means sometimes morning suits or tuxedos, "informal" means suits, and "casual" means sportcoats (or maybe no coat at all). You're firmly in the "informal" camp, though "informal" means what many people think of as "formal." Clear as mud?

Well, it sounds like neither you nor your groomsmen lead a very formal lifestyle, so *my* inclination would be to steer you towards black. (I'd also recommend that the groosmmen buy rather than rent--it's not much more expensive, and then they'll have a suit for the times they need one.)
I don't think the grey would be inappropriate; however, if you're only going to own one suit, I think black is more versatile. It's not inappropriate scarcely during the day, and you could get away with wearing it to a more formal secondly evening wedsding instead of a tuxedo (whereas a grey suit would be more out of place there). Also, you'd be set if you had to go to a funewral (heaven forbid), which is a time when you usually don't have the lead time to go out and buy a suit and have it sweetly altered to fit. If any of you look truly horrid in black, you could go with the grey.
I just think that if you take the long view, you'll be better off with a black suit in your closet.