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Computer monitors, for example, use red, green and blue phosphors to display images. These
colors are specified using the RGB model.
Saturation
Saturation, sometimes called chroma, is the strength or purity of the color. It represents the
amount of grey in proportion to the hue and is measured as a percentage from 0% (grey) to
100% (fully saturated). On the standard color wheel, saturation increases from the center to the
edge.
Secondary Color
Mixing two primary colors in equal amounts will produce a secondary color (e.g., Red + Green =
Yellow).
Spot Color
A term used in offset printing. These are additional colors used in printing that are not a part of
the process ink set and are specified individually. These colors are required when the end result
is of paramount importance (such as within a corporate logo) as there is a substantial increase
in cost. A separate plate is also required.
Subtractive Primaries
Cyan, Magenta and Yellow (CMY) are the subtractive primaries and are the basis for toners
used in color printing. Color is produced because the toners are designed to absorb certain
wavelengths of light and transmit others.
YCC
This system was developed by Kodak for encoding color images for display on video monitors.
RGB values are converted to a luminance component (Y) and chromatic components (C1) and
(C2).
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