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.
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.
Sky blue