Persian blue comes in three major tones:Persian blue proper: a bright mediumblue;medium Persian blue (a medium slightly grayish blue that is slightly indigoish); and a kind of darkblue which is referred to asPersian indigo,dark Persian blue, orregimental, that is much closer to theweb colorindigo.
The colorPersian indigo is displayed at right. Another name for this color isregimental because in the 19th century it was commonly used by many nations for navy uniforms, though it is seldom used in modern times.
Persian indigo is named for an association with a product from Persia: Persian cloth dyed withindigo.
The first recorded use ofregimental (the original name for the color now called Persian indigo) as a color name in English was in 1912.[6]
Manymosques inIran, such as the enormousShah Mosque inIsfahan, have interiors that are faced withtiles that arePersian blue or close variations of it.[7]
The colorPersian indigo, which as noted above was originally calledregimental, was called by that name because it used to be the color of thenavy uniforms of a number of differentnations in the late 19th and early 20th centuries due to the fact that it was easy and inexpensive to useindigo dye to dye navy uniforms.
^The color displayed in the color box above matches the color calledPersian blue in the 1930 book by Maerz and PaulA Dictionary of Color. New York: 1930, McGraw-Hill; the colorPersian blue is displayed on page 95, Plate 36, Color Sample L4.
^Maerz and PaulA Dictionary of Color New York:1930 McGraw-Hill Page 201; color sample of Persian blue: Page 95 Plate 36 Color Sample L4
^The color displayed in the color box above matches the color calledregimental in the 1930 book by Maerz and PaulA Dictionary of Color New York:1930 McGraw-Hill; the colorregimental is displayed on page 117, Plate 47, Color Sample C10.
^Maerz and PaulA Dictionary of Color New York:1930 McGraw-Hill Page 203 (It is also stated under the entry onPersian Blue on page 201 that the color on Plate 47 Color Sample C10 (regimental) is a [darker] tone of Persian Blue.); color sample of Regimental: Page 117 Plate 47 Color Sample C10
Media related toThe Snake Charmer at Wikimedia Commons (1870): A painting byJean-Léon Gérôme which shows a snake charmer in a Persian market with Persian blue tiles in the background