Canon MultiPASS F20 Software User's Manual page 42

5. In the Color dialog box, under Basic Colors, click an available color.
6. If you want to customize a stamp color, under Basic Colors, click the
color that is closest to your desired custom color. Then, click Define
Custom Colors.
7. Move the slider, or enter the color values, until you have reached the
desired mix for your custom color.
Chapter 3 Printing 38