The first use of "light blue" as a color term in English is in the year 1915.
In Russian and some other languages, there is no single word for blue, but rather different words for light blue (голубой, goluboy) and dark blue (синий, siniy). The Ancient Greek word for a light blue, glaukos, also could mean light green, gray, or yellow.
In Modern Hebrew, light blue, tchelet (תכלת) is differentiated from blue, kachol (כחול). In Modern Greek, light blue, galazio (γαλάζιο) is also differentiated from blue, ble (μπλε).
During the 2000s, this color saw a surge of popularity due to a few American sports teams adopting the color for their uniform. Famous examples include the Memphis Grizzlies, Denver Nuggets, Oklahoma City Thunder, and the Atlanta Thrashers.
Displayed at the right is the color that is called "light blue" in Crayola crayons. It was only available in 1958.
Cartography
In historical atlases published in Germany, light blue is traditionally used as a color to represent Germany, as opposed to pink for England, purple for France, and light green for Russia.
Heraldry and flags
Bleu celeste (sky blue) is a non-standard tincture in heraldry and vexillology.
The national flags of Argentina, the Bahamas, Botswana, Fiji, Guatemala, Honduras, Kazakhstan, Micronesia, Palau, Somalia, and Tuvalu all have light blue as a dominant color.
Gender
In modern Western culture, gender norms for colours are that light blue is commonly used to represent boys as opposed to the color pink, which is used to represent girls (but see the counterexamples at List of historical sources for pink and blue as gender signifiers).
Interior design
The color light blue is commonly regarded as calming and relaxing. Because of this, it is sometimes used to paint hospital rooms.
Since the color light blue reminds many people of water, light blue is a popular color for painting bathrooms or for porcelain bathroom fixtures.
School colors
Cambridge Blue is a shade of light blue adopted by the University of Cambridge, in contrast with the University of Oxford which has adopted a dark shade of blue (Oxford Blue).