If you are stuck with a colour and have no idea what complementary colours will look good, check this site out COLOURLovers.com. It's a resource that monitors and influences colortrends.
COLOURlovers gives the people who use colour - whether for websites, ad campaigns, product design, or in architectural specification -a place to check out a world of color, compare color palettes, submit news and comments, and read color related articles and interviews.
We like the latest website palette column.