Not entirely. The color renderings on your printer will be different than on the original cards. With tests like the nitrAtes, those small color variations mean the difference between a low and high reading.
You can do the following:
Originally Posted by API Tech support
Due to discrepancies with ink jet printers and the color of the cards, pdf versions are not available. You can get a replacement set of cards by sending in a $2 check to:
50 East Hamilton Street
Chalfont, PA 18914
Attention: Brian in Technical Services
Include a brief letter stating the type of color cards that you need and include your return mailing address. Once we receive your letter a set of color cards will be sent in the mail. The $2 will cover shipping and handling for the color cards.
I got this response from API when I asked if I could get replacement cards since some of mine were getting pretty ratty.