We've had requests for our custom favors in the following combinations:
Pink and black
Blue, Purple and Silver (actually anything with Silver)
Hot Pink And Orange
Best color for 2010 is whatever the bride picks. After doing this for a lot of years I have found that you cannot predict any colors. The floral people have recently pick an aqua as the pantone color of the year and magazines are showing yellow on every page but at the end of the day the bride choose her colors based on whatever she likes. I think its really silly to try and second guess the bride