Peacock Blue

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A type of organic color pigment used in printing inks. There are two types of Peacock Blue: fugitive (which are several greenish shades of blue that are not very lightfast and tend to bleed in water, but are inexpensive) and permanent (which are much more lightfast, stronger, and more expensive than the fugitive variety, although they are not as clean and brilliant). (See Organic Color Pigments.)