I was in a fabric store yesterday trying to pick out fabric. I have a terrible time with that. It was suggested I get a clear red thing that you hold over several fabrics that helps determine the tone of the fabric so the correct color combination makes the quilt “pop.” I don’t know the name of it and looking up clear red tonal estimator came up with various acrylic options. If I have described this thing so anyone can understand what I’m looking for, please let me know if there is an actual quilting item and a name for it. Thanks so much.