The primary subtractive colors, magenta, cyan, and yellow, are of paramount importance to the color printing and photography industry. These colors can be combined to form the millions of print colors. Equal parts of the three primary subtractives yields the color black.

The default opening condition of this tutorial has three colored circles (magenta, cyan, and yellow) bouncing randomly around. Use the "manual" button to suspend their motion. Next, use the mouse cursor to drag the circles over one another to produce the primary additive colors and black.

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