Fabricmatcher.com is a nice online app that finds fabrics based on a color you specify or an image you upload. If I remember correctly, it used to be associated with Hancock’s of Paducah and search results were from their inventory. But that relationship appears to have ended. Now it is partnered with Moda and the Australian shop Material Obsessions. Moda offers a huge range of fabrics, so the search results are satisfying, but the trouble is you can’t order retail from them. You can, however, print a “shopping list,” which could lead to some fun searching. Materials Obsessions has a great selection of modern fabrics, and they do ship internationally, but at least here in the U.S. the shipping costs make ordering fabric from overseas impractical. Still, anyone can use the tool whether ordering from the shop or not.