Which ribbon colour is the best?
Compare them against the sample wedding colours:
I think 5 is pretty close to venue decor colours and 3 is close to the dress colours. 1 is an elegant dark colour that kind of goes with that dark coloured dress in the lower left corner that is meant to be a contrast to the other colours, but still matching. I think 2 is a little bit too bright, and 4 is a little bit too dull. 4 does, however, kind of match the room decor (but maybe too much?)
These ribbons are from http://www.midoriribbon.com/