It's easy as 1, 2, 3... Start with your desired color card.Choose a color scheme options. Find the corresponding color cards to create the perfect color combination.Improved! Larger color swatches and expanded guidelines for use. Portable size. Based on the Ives Color wheel. WARNING: This product can expose you to chemicals including DEHP, which is known in the state of California, to cause cancer. For more information, go to www.P65Warnings.ca.gov.