Hmmm...maybe it is just my laptop monitor showing inaccurate colors, but those API pics on the web site don't quite match up to my API cards. Your mileage may vary depending on your display. For example, the ammonia card on the web site showed a yellow color for 0.25 ppm, but the actual card color is light green. That might throw you off slightly. Other test colors were off, too, on my screen.
Joe - I can certainly scan my cards and send you JPEGs this week if you prefer. Just send me a message if you want them.