Ina, there are many helpful books to help with color choices....Color Magic for Quilters by Ann Seely and Joyce Stewart, or from Rodales Successful Quilting Library the volume Creative Guide to Color and Fabric,or you could go to www.aboutsewing.com and find some answers to the question. I was once told to go look in my closet put together a few outfits....My color coordination and mixing shows there...not any different in quilting. Another way is to get a floral with many colors in it and then match the various colors with the main one. Prints or plain works fine. Nothing is one color in nature. These are pretty much everyday methods. Now if you are into a more modern approach....check your artwork. Truly though anything goes....quilts are an expression of your vision...See it, feel it, make it, share it! That's all there is to it. Would love to see what you do. Good luck.