Indigo dye is the color that is called Añil (the Spanish word for "indigo dye") in the Guía de coloraciones (Guide to colorations) by Rosa Gallego and Juan Carlos Sanz, a color dictionary published in 2005 that is widely popular in the Hispanophone realm.

This tone of navy blue was formulated as a Crayola color in 1958.

Another name for this color is regimental because in the 19th century it was commonly used by many nations for navy uniforms, though it is seldom used in modern times.

Navy blue is used by numerous professional and collegiate sports teams: Association football Australian Football League Major League Baseball

National Rugby League American Collegiate Teams