Ruby in a British standard
This dark, purple tinged red is called plain ruby in British Standard 381, where it is color number 542. That standard sets colors for coding, marking and other special jobs. The British color lists were first drawn up in 1930 and reached their present form in 1955.
The Wikipedia article on ruby shows this British color under the heading deep ruby. That keeps it apart from the much brighter ruby, #E0115F, taken from Maerz and Paul's color dictionary of 1930.
Other rubies
Ruby has been used as a color name in English since 1572. The ISCC-NBS system calls this version a dark purplish red. Two more gem reds on this site are antique ruby and medium ruby, which was a Crayola Gem Tones crayon. White text on deep ruby reaches a contrast ratio of 7.39 to 1.

