The snapshots show all the base colors: red, green, blue, cyan, magenta, yellow, black, and white.
Enrique Stura of Uninet Imaging Inc. comments, "This is useful to demostrate the difference between the colors resulting from a PC monitor and from a color laser printer output. In fact the KCMY values for each possible RBG combination in the Pantone chart can be directly associated with quantities in micrograms of each of the toners for black, cyan, magtenta, and yellow used for a given percentage of print coverage."