It is a spectral color which lies at, or near, the short-wavelength end of the traditional "blue" and possibly was classified as "indigo" by Newton.

NCS Blue can only be displayed approximately on a computer screen, as these spectral colors have been adjusted to fit into the sRGB gamut.

In the 21st century, this hue is classified as an variation of azure that is on the border of cyan.

The term tint and shade is used in its technical sense as used in color theory.

In this section, the term 'tint' usually refers to a blueish color mixed with white or light gray.

It is named after the Periwinkle flower and is also commonly referred to as a tone of light blue.

Bluebonnet is a bright shade of blue with a slight violet tinge.

It represents the color of bluebonnet flowers, which are part of the lupin family.

Twin Blue is so named since its HEX color code spells out "BED" twice.

The color is also recognized for bearing close semblance to the light pastel shade of cyan common on bed sheets.

[12] It owes its name to its being the color of the House of Savoy, a ruling dynasty in Italy from 1861 to 1946.

IKB's visual impact comes from its heavy reliance on ultramarine, as well as Klein's often thick and textured application of paint to canvas.

It was originally derived from lapis lazuli, a bright blue mineral.

Julius Caesar reported (in Commentarii de Bello Gallico) that the Britanni used to colour their bodies blue with vitrum, a word that means primarily "glass", but also the domestic name for the "woad" (Isatis tinctoria), besides the Gaulish loanword glastum (from Proto-Celtic *glastos "green").

The name is derived from the Dutch pottery Delftware, also known simply as "Delft Blue".

[48] Azure (/ˈæʒər, ˈeɪʒər/ AZH-ər, AY-zhər, UK also /ˈæzjʊər, ˈeɪzjʊər/ AZ-ure, AY-zure)[51][52][53] is a variation of blue that is often described as the color of the sky on a clear day.

The web color Alice blue is a pale tint of azure.

The first recorded use of "light blue" as a color term in English is in the year 1915.

The first recorded use of sky blue as a color name in English was in 1728 in the Cyclopædia of Ephraim Chambers.

[58] Prior to the Chambers reference, the color had first been used in 1585 in a book by Nicolas de Nicolay where he stated "the tulbant[clarification needed] of the merchant must be skie coloured".

[62] 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.

[66] Many of Resene's shades of blue and cyan are named after places in New Zealand's Marlborough Sounds, where the town of Picton is located.

Puerto Rican blue is a bright, cool, saturated shade of blue matching the shade of color of the triangle on Puerto Rico's current national flag.

The web color royal blue is a rich tone of azure.

Honolulu blue is the tone of azure used in association with the Detroit Lions football team.

[85] French blue[86] is a deep azure color commonly[citation needed] used in quality men's dress shirts.

The traditional color called royal blue is a dark shade of azure.

Julius Caesar reported (in Commentarii de Bello Gallico) that the Britanni used to colour their bodies blue with vitrum, a word that means primarily "glass", but also the domestic name for the "woad" (Isatis tinctoria), besides the Gaulish loanword glastum (from Proto-Celtic *glastos "green").

The name is derived from the Dutch pottery Delftware, also known simply as "Delft Blue".

[66] Many of Resene's shades of blue and cyan are named after places in New Zealand's Marlborough Sounds, where Resolution Bay is located.