page_title: Shades of azure
section_title: Deep sky blue
hierarchical_section_title: Shades of azure / Variations of azure / Deep sky blue
caption_attribution_description: Blue Grotto , Capri , Naples , Campania , Italy
context_page_description: Azure is a variation of blue that is often described as the color of the sky on a clear day.
  On the RGB color wheel, "azure" is defined as the color at 210 degrees, i.e., the hue halfway between blue and cyan. In the RGB color model, used to create all the colors on a television or computer screen, azure is created by adding a little green light to blue light. The complementary color of azure is orange.
  In the X11 color system which became a standard for early web colors, azure is depicted as a pale cyan or white cyan.
context_section_description: Deep sky blue is an azure-cyan color associated with deep sky blue.
  Deep sky blue is a web color.
  This color is on the color wheel (RGB/HSV color wheel) halfway between azure and cyan.
  The traditional name for this color is Capri.
  The first use of Capri as a color name in English was in 1920.
  The color Capri in general is named for the azure-cyan color 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 color Capri is named after the color 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 name deep sky blue for this color did not come into use until the promulgation of the X11 color list in 1987.
  The name Capri is still used for this color as well as the name deep sky blue.
caption: Blue Grotto waters showing their distinctive azure colour
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