Wedding themes require perfect execution; you can't just pick a theme and not go all the way with it.
If things aren't done right; your wedding might not have any central idea or concept behind it at all.
Color is one of those basic things that will carry the theme through.
You can't have a summer wedding with everything in blacks and blues.
The trick with a color scheme and a wedding theme is that they have to balance each other.
You can't have an overwhelming amount of color and you can't have too many things highlighting your theme.
The best way to keep colors from taking over a table or wedding altar is to add neutral colors at significant points to tone things down.
Since white is the traditional color for weddings, many people use it to keep the decorations from getting too loud but you can use other colors like sliver or dull greys or a matte silver.
If you've got vases that are just too bright and are not letting the flowers shine through, you can take a can of silver spray paint and spray the vases.
Use silver or bronze to give it a fun antique look.
If you're going for the traditional white and black at your wedding, you can add splashes of bright color in different places.
Have something extremely unique and colorful at the reception; you're table centerpieces can be an ideal way to show that splash of color in your wedding arrangements.
Use something unique like fresh fruit arrangements or fruit bouquets.