Capri or deep sky blue is a deep shade of

sky blue Sky blue is a shade of light blue comparable to that of a clear daytime sky. The term (as "sky blew") is attested from 1681. A 1585 translation of Nicolas de Nicolay's 1576 ''Les navigations, peregrinations et voyages faicts en la Turquie'' in ...

which is between

cyan Cyan () is the color between green and blue on the visible spectrum of light. It is evoked by light with a predominant wavelength between 490 and 520 nm, between the wavelengths of green and blue. In the subtractive color system, or CMYK color ...

and azure on the colour wheel. The colour Capri in general is named for the colour of the

Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ea ...

around the island of

Capri Capri ( , ; ; ) is an island located in the Tyrrhenian Sea off the Sorrento Peninsula, on the south side of the Gulf of Naples in the Campania region of Italy. The main town of Capri that is located on the island shares the name. It has been ...

off

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...

, the site of several villas belonging to the Roman Emperor

Tiberius Tiberius Julius Caesar Augustus (; 16 November 42 BC – 16 March AD 37) was the second Roman emperor. He reigned from AD 14 until 37, succeeding his stepfather, the first Roman emperor Augustus. Tiberius was born in Rome in 42 BC. His father ...

, including his Imperial residence in his later years, the ''

Villa Jovis Villa Jovis ("Villa of Jupiter") is a Roman palace on Capri, southern Italy, built by emperor Tiberius and completed in AD 27. Tiberius ruled mainly from there until his death in AD 37. Villa Jovis is the largest of the twelve Tiberian villas ...

''. 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. The first use of ''Capri'' as a colour name in English was in 1920.Maerz and Paul ''A Dictionary of Color'' New York:1930 McGraw-Hill Page 191 The normalized colour coordinates for Capri are identical to deep sky blue, which was formalized as a color in the

X11 colour names In computing, on the X Window System, X11 color names are represented in a simple text file, which maps certain strings to RGB color values. It was traditionally shipped with every X11 installation, hence the name, and is usually located in ''< ...

over 1985–1989. Blue Grotto, Capri, Italy

References

Quaternary colors Shades of blue Shades of cyan Capri, Campania {{colour-stub