ApolloGel

A line of double-coated plastic color media by Apollo Design Technology Inc.
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The most recent line to come to market of the "big four," it uses a four-digit numbering scheme that actually correlates to the visible spectrum. It is also known for its descriptive and often comical color names, such as Purplexed, Alexander the Grape, Spanked Pink, and of course, Fatherless Amber.