This is an accepted version of this page The color cyan, a greenish-blue, has notable tints and shades.

As such, the CMYK printing process was invented in the 1890s, when newspapers began to publish color comic strips.

A typical formulation of process cyan is shown in the color box at right.

[13] It (or more specifically #004C54) has been the primary team color for the National Football League (NFL)'s Philadelphia Eagles since 1996.

It was formulated by Crayola in 1994 as part of their Gem Tones range of crayons.

[18] Kelly Moore Paint's "color of the year" for 2019 was their peacock blue.

[citation needed] This is the color that is called sky blue in Crayola crayons.

[26] Since then, Tiffany & Co. has used the color extensively on promotional materials, including boxes and bags.

The word turquoise comes from the French for Turkish, as the gem was originally imported from Turkey.

[31] Perhaps owing to sharing its name with a mineral, turquoise is currently a more common term in English than other cyan-like colors.

[32] Verdigris is the common name for a green pigment obtained through the application of acetic acid to copper plates[33] or the natural patina formed when copper, brass or bronze is weathered and exposed to air or seawater over a period of time.

The name verdigris comes from the Middle English vertegrez, from the Old French verte grez, an alteration of vert-de-Grèce ("green of Greece").

Used as a pigment in paintings and other art objects (as green color) since ancient Greece, it was originally made by hanging copper plates over hot vinegar in a sealed pot until a green crust formed on the copper.

The vivid green color of copper(II) acetate made this form of verdigris a much used pigment.