This is an accepted version of this page Variations of gray or grey include achromatic grayscale shades, which lie exactly between white and black, and nearby colors with low colorfulness.

The colors white and black are not usually thought of as shades of gray, but they can be thought of as shades of achromatic gray, as both contain equal amounts of red, blue and green.

White is a color, the perception of which is evoked by light that stimulates all three types of color sensitive cone cells in the human eye in equal amounts and with high brightness compared to the surroundings.

Achromatic grays are colors in which the RGB (red, green, and blue) values are exactly equal.

[3] It was, however, absent from the original 1987 version of the list,[4] but present in Paul Raveling's version[5] which added, amongst other things, "[l]ight and off-white colors, copied from several Sinclair Paints color samples".

Spanish gray is the color that is called gris (gray in Spanish) in the Guía de coloraciones (Guide to colorations) by Rosa Gallego and Juan Carlos Sanz, a color dictionary published in 2005 that is widely popular in the Hispanophone realm.

Davy's gray is a dark gray color, made from powdered slate, iron oxide and carbon black named for Henry Davy.

It is so called because the color is the shade of gray from the specular micaceous hematite paint used for rustproofing iron and steel battleships.

[22] It describes the color of several metals used in industrial applications, such as tarnished gunmetal, or parkerized steel.

Cool grays have noticeably bluish, greenish, or violetish hues.

203 (identified as gray blue) at the following website: http://tx4.us/nbs/nbs-g.htm—The ISCC-NBS Dictionary of Colo(u)r Names (1955), a website for stamp collectors to evaluate the colors of their stamps.

Poet George Sterling once wrote a poem calling San Francisco the "cool grey city of love"[25] The phrase cool grey as applied to San Francisco refers to the frequent fogs from the Pacific Ocean that envelop the city.

[26] Before 1912, the word cadet gray was used as a name for a type of military issue uniforms.

In 1815, it had earlier become the color of the uniforms of the United States Military Academy (West Point).

Brown colors also include dark shades of rose, red, and amber.

Pink colors include light tones of rose, red, and orange.

Its name is believed to have originated from the French word "gris," meaning gray.