I carry this around in my purse, now, to help choose colors for quilting material. The red and green filters have made it MUCH easier to choose a range of colors to give better contrast in fabric choices. I have started using them in collage creation, also, when I'n stuck on what to do next. They always help determine whether to go darker or lighter. And the color cards themselves, that help choose color combinations, are great. I'm not much of an artist or quilter, but this, I think, makes me a better one than I would be without it.