The dress code for a is usually formal, as in the men are wearing suits and women are wearing evening dresses. If you’re unsure how formal people will be dressed you can always ask the bride/groom or simply judging by the type of crowd invited or the location of the event.
Let’s put it like this. The wealthier the crowd, the more extravagant dresses you will see. The simpler the wedding is (cost wise) the less formal you need to be. That’s pretty straight forward.
As a general rule I would say gown or mid length dress for the ladies. No mini dresses or sexy outfits! A wedding is usually a classy affair and you need to dress accordingly. Plus there is always elderly people around so you need to show respect towards them and their generation.
With regards to color it’s a big NO-NO to wear a white dress as a guest. Be also careful with “white-ish” colors like Champagne, pale nude / pink. If you still want to wear any of them you can ask the bride/groom what color the bridesmaids dresses will be, so you don’t show up looking like a bridesmaid.
Here are some wedding guest outfit inspiration from this summer. As you can see on some pictures, Jet set Babes go really all in with their outfits.