Spot Color
From ColorWiki
Spot color refers to a color achieved on press with an individual ink. A spot color requires a dedicated plate and printing unit.
One of the more popular spot color ink sets is the Pantone Matching System. Prior to PANTONE's wide adoption vendors often had their own color call-outs or nomenclatures. The PANTONE matching system is based on 14 "base" inks that are used to mix all the possible colors in the system. The "base" inks are as follows:
Yellow
021 Orange
Warm Red
032 Red
Rubine Red
Rhodamine Red
Purple
Violet
072 Blue
Reflex Blue
Process Blue
Green
Black
Transparent White
The PANTONE Formula guide contains the "recipes" for all the colors in the PANTONE matching system. PANTONE is only one of many color systems. Others include TOYO, TRUMATCH, & FOCOLTONE.
(Don't try to use spot colors in newspapers for instance. The chances of the press operator loading another plate just for your logo on page 27 is remote indeed.)
See Also