First developed at the turn of the 20th century, Munsell color tools are used for producing physical color standards across a wide range of industries and disciplines to communicate color easily and accurately. Often Preservationist and Conservators use the Munsell Color System when attempting to document historic finish colors. These scientifically accurate color chips can used to obtain chemically specific color reproductions when compared with micrographs of paint layers cross-section. Even having used this system for years I had been oblivious that the electromagnetic spectrum color “Orange” is identified as “YR” or “Yellow Red” as a pigment in the Munsell color chart until I read this article on the Munsell Color Blog. According to the post, after the system was established this debate created hue and cry with some scholars. :) The Munsell color blog has lots of great posts that are worth checking out.