Mine tend to always have a theme even if it is not color it might be by style like 1930, pastels, civil War, patriotic, Hawaiian, floral, etc. You can also tie a quilt with no color scheme together by adding a more neautral sashing. Even the ones that had no color scheme seemed to atleast be all brights, pastels, or jewel tones etc. I think if it appeals to you go for it.