The color, electric violet, is the closest approximation to middle spectrum violet that can be made on a computer screen, given the limitations of the sRGB color gamut. It is an approximation of the color violet at about 400 nanometers as plotted on the CIE chromaticity diagram, in the middle of the violet range of from 380 nanometers to 420 nanometers, assuming indigo as a separate spectrum color from 420 to 450 nanometers. Other names for this color are middle violet or simply violet.
The color vivid violet, a color approximately equivalent to the violet seen at the extreme edge of human visual perception. When plotted on the CIE chromaticity diagram, it can be seen that this is a hue corresponding to that of a visual stimulus of approximately 380 nm on the spectrum. Thus another name for this color is extreme violet.
The color box displays the web color dark violet which is equivalent to pigment violet, i.e., the color violet as it would typically be reproduced by artist's paints, colored pencils, or crayons as opposed to the brighter "electric" violet above that it is possible to reproduce on a computer screen.
Pigment violet (web color dark violet) represents the way the color violet was always reproduced in pigments, paints, or colored pencils in the 1950s. By the 1970s, because of the advent of psychedelic art, artists became used to brighter pigments, and pigments called "Violet" that are the pigment equivalent of the electric violet reproduced in the section above became available in artists pigments and colored pencils. (When approximating electric violet in artists pigments, a bit of white pigment is added to pigment violet.
Mauve (from the French form of Malva "mallow") is a color that is named after the mallow flower. Another name for the color is mallow with the first recorded use of mallow as a color name in English in 1611.
Since the color mauve has a hue code of 276, it may be regarded as a pale tone of violet.
Spanish violet is the color that is called Violeta (the Spanish word for "violet") 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.