For my wedding I had my groomsmen and myself wearing Daytime jackets with vest, white dress shirts, and black silk neckties....(I had a silver tie)....

It looked great and even more important...
We didn't take away from the bride (Remeber it's her day!!!!) by being too dressy (PC jackets with all the buttons)

It was an outdoor day/evening wedding....so the look was good for both times of the day.