Datacolor Spyder Checkr Replacement Cards Over time the colours on your Spyder CHECKR colour cards will fade with exposure to any light source. This gradual fading will eventually affect the accuracy of colour balance in your photography workflow. When you notice the red patch has changed to a yellow-orange colour in the Fade Checkr window at the bottom left corner inside the Checkr, it is time to replace the color cards. This will assure you have the true spectrally engineered colours for all 48 patches on the two cards, providing you with the utmost in colour accuracy for your photography.