My dress is black, should i ask my guests not to wear a black dress?

Yes, it is too much. You can't properly dictate what your guests wear. If you're wearing a non-traditional dress that's fine, but it's also on you if lots of guests happen to be wearing it, too. If you're that concerned about competition, most people know that they shouldn't wear a white, bridal looking dress as a guest.

These are adults. You shouldn't even think about trying to control their wardrobe.

Yes, I think it’s too much; especially since black dresses are a staple in most people’s wardrobes and common to wear to weddings.
If you makes you feel better, both my wedding dresses wore black and most my guests wore black… and there was zero feeling of “competing with the bride”, or outshining.

View Quoted Comment Cool! Thanks for you guys’s input!
Just bc white dresses are a no no I thought maybe the same dress color as the bride would also be weird

Are you trying to keep it a surprise? If not, on your dress code page of your wedding website, you can simply state “the bride will be wearing black.” You should not request that guests avoid it, but a lot of them will take that into account in selecting their outfit (just don’t be upset at the ones who still show up in black, as that is a super common color in a lot of people’s wardrobes).

No white and no black is a great rule to set!!!

Yes, it's too much. It's not considered polite to dictate what guests wear. A lot of people have black dresses to wear for special events, so it might be inconvenient to set that rule. Your black dress with crystals sounds amazing!!

View Quoted Comment I think the dress sounds amazing also!
OP, would love to see a picture of it!

Also, if you are wearing a black dress, I assume you like a dark aesthetic. I will say, having most of our guests wearing black looked sooooo cool in pictures.

It is never appropriate to say a word to guests about what colors to wear or not to wear, because guests are adults who have dressed themselves for years and they are not props for photos. You can tell them what formality using standard choices with no creative names. For example, semi formal/cocktail is the default when no dress code is listed. It’s what you see in most films. Black tie is often only used when the venue requires it for guests to be allowed inside, such as the Oscars.

Yes! I did that and everyone was shocked why the invitation said wear white only. P.s don’t tell them your dress color

Let people wear what they want but you can casually mention your color dress. No one will be looking at other peoples clothes except you. Although I do remember one of my sisters wore black.

I’m also wearing a black dress for my wedding. I will be asking people to please not to wear black dresses or all black attire due to the bride wearing black. I did specify that black dress pants, suit coats etc are okay. If it’s acceptable for traditional brides to not have guest wear white, same should apply for more non traditional brides. My wedding is on the smaller side with just family and very close friends. Everyone for the most part knows I will be wearing black and had absolutely no issue with my request. I did also start letting everyone know far in advance and I think that helped. In my experience attending other weddings very few people choose to wear black anyway. It’s your wedding and you should do what will make you happy.