Shari-these are for you since you asked for a quick and easy way to add color to a wedding brunch table.
Add ribbon to the table like just 3 different colors down the middle like below. You don't have to cross them if you don't have enough.
Make these cute triangle pendant things out of cute paper.
You could cut hearts out of cute color print paper and string them together and lay them down the center on the table.
I love this idea and I came up with it all by myself. Go to the library and rent old love books--love poetry books, love stories, or anything that looks old. You can stack these up on the tables.
And balloons are always fun and cute if done right.