Azure is a blue-cyan color on the HSV color wheel (Hue, Saturation, Value) at 210 degrees. Azure is the hue that is halfway between blue and cyan. Azure is one of the tertiary colors on the HSV color wheel. Its complementary color is orange.
The word Azure is a near synonym for the color blue. Commonly it refers to a bright blue, resembling the sky on a bright, clear day.
The term azure derives from the Persian لاژورد (lazhward), which was the name of a place in modern Turkestan known for its deposits of lapis lazuli (“stone of lazhward”). The word was adopted into Old French by the twelfth century.
"United Nations blue", as it's called by the United Nations, is the light blue color of the Flag of the United Nations and of the helmets worn by the United Nations peacekeeping forces.