What time is this wedding? Reception?
Well, if you have the money, suit for the wedding and tux for reception. If you don't, stick with a tux. If it is black tie, go with the normal black jacket, slacks, shoes, socks, bow tie, with white shirt. Or you can go with a solid black tie and vest.
There are too many type of events to tell you what to wear to each.
If you decide to go with a suit, stick to dark colors after 6 p.m. or dark. Before you can wear light colors.
Light gray, blue, brown, &c. for the day, and dark blue, gray, black for the evening.
Keep socks, tie, and pocket square the same color, make sure the socks are darker than the suit and lighter than the shoes, if you are going to contrast colors, like an orange and a blue don't need to follow this rule...just make sure the shade is close to the same. Wear cuff links. Make sure your shoes are polished and shined. If you can wear a three piece suit and three button jacket, do it.