page_title: Sky blue
section_title: Deep sky blue
hierarchical_section_title: Sky blue / Variations / Deep sky blue
caption_attribution_description: English: Near the entrance of the Blue Grotto at Capri, Italy
context_page_description: Sky blue is a colour that resembles the colour of the unclouded sky at noon reflecting off a metallic surface. The entry for "sky-blue" in Murray's New English Dictionary reports a first sighting of the term in the article on "silver" in Ephraim Chambers's Cyclopaedia of 1728. However, many writers had used the term "sky blue" to name a colour before Chambers. For example, we find "sky blue" in A Collection of Voyages and Travels, vol. 2, p. 322, where John Nieuhoff describes certain flowers: "they are of a lovely sky blue colour, and yellow in the middle".
  The sense of this colour may have been first used in 1585 in a book by Nicolas de Nicolay where he stated "the tulbant of the merchant must be skie coloured".
  Displayed at right is the web colour sky blue.
context_section_description: Deep sky blue is an azure-cyan colour associated with deep shade of sky blue.
  Deep sky blue is a web colour.
  This colour is the colour on the colour wheel (RGB/HSV colour wheel) halfway between azure and cyan.
  The traditional name for this colour is Capri.
  The first use of Capri as a colour name in English was in 1920.
  The colour Capri in general is named for the azure-cyan colour of the Mediterranean Sea around the island of Capri off Italy, the site of several villas belonging to the Roman Emperor Tiberius, including his Imperial residence in his later years, the Villa Jovis.  Specifically, the colour Capri is named after the colour of the Blue Grotto on the island of Capri. as it appears on a bright sunny day.  Today the island of Capri is a resort island popular with tourists.
  The colour name deep sky blue for this colour did not come into use until the promulgation of the X11 colour list in 1987.
  The name Capri is still used for this colour as well as the name deep sky blue.
caption: Sky-blue waters of the Blue Grotto in Capri
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