Xerox Fiery color server, User Manual

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A
A-5 Desktop Color Primer
Many computer applications include dialog boxes in which you choose colors by
manipulating hue, saturation, and brightness. For example, some applications use a
color picker that can be reconfigured according to your preference (as shown in the
following figure).
Additive and subtractive color systems
Color devices used in desktop publishing and printing simulate the range of visible
colors using a set of primary colors that are combined to create other colors. There are
two methods for creating a range of colors from a set of primary colors. Computer
monitors and scanners are based on the
additive color model . Printing technologies,
including the Color Server and offset presses, are based on the subtractive color
model .
Additive (RGB) color
Color devices that use the additive color model create a range of colors by combining
varying amounts of red, green, and blue light. These colors are called the
additive
primaries (shown in the following figure). White is created by adding the maximum
amount of red, green, and blue light available. Black occurs wherever all three colors
are absent. Grays are created by adding equal amounts of all three color together.