This is the color traditionally called prune because it is a representation of the average color of prunes. Prune is the French word for "plum", but in English the name "prune" is applied to dried plums. This color is a representation of the color of cooked dried plums (prunes).
The first recorded use of prune as a color name in English was in 1789.
^RGB approximations of RYB tertiary colors, using cubic interpolation. The colors displayed here are substantially paler than the true color a mixture of paints would produce.
^William J. Miskella, 1928, Practical Color Simplified: A Handbook on Lacquering, Enameling, Coloring And Painting, pp
^John Lemos, 1920, "Color Charts for the School Room", in School Arts, vol. 19, pp 580–584
^Maerz and Paul A Dictionary of Color New York:1930 McGraw-Hill Page 202; Color Sample of Plum4: Page 117 Plate 47 Color Sample J9 Note: The color designated plum (color #8E4585) that is displayed above matches the color identified as plum in the color sample in Maerz and Paul