 An old name for this color, used by Robert Ridgway in his 1912 book on color nomenclature, "Color Standards and Color Nomenclature", is true purple.This purple used in HTML and CSS actually is deeper and has a more reddish hue (#800080) than the X11 color purple shown below as "purple" (X11 color) (#A020F0), which is bluer and brighter.This color may be called HTML/CSS purple.