In addition to what others have said about eQuilter, a neat feature of the site is the color descriptions. When you look at a specific fabric, all the colors in it are listed with the photo, AND those color names are consistent throughout the website. So hunter green in fabric A matches hunter green in fabric B even if from another brand (this may not hold for Kona etc solids, which may come already named). Also, you can request swatches if matching something you already have is critical.