The Munsell color method is a color system that specifies colors depending on three color dimensions, hue, value, and chroma (difference from gray with a given hue and lightness).
Professor Albert H. Munsell, an artist, wanted to generate a “rational strategy to describe color” based on the principle of “perceived equidistance”, which would use decimal notation as opposed to color names (that he felt were “foolish” and “misleading”). He first started work with the system in 1898 and published it entirely form colored Notation in 1905. The munsell soil color chart is still used today.
Munsell constructed his system around a circle with ten segments, arranging its colors at equal distances and selecting them in such a way that opposing pairs would cause an achromatic mixture.
The system contains an irregular cylinder with the value axis (light/dark) running up and down through it, as does the axis of your earth.
Dark colors are at the end from the tree and light-weight at the top, measured from 1 (dark) to 10 (light).
Each horizontal “slice” from the cylinder over the axis can be a hue circle, which he divided into five principal hues: red, yellow, green, blue, and purple, five intermediates, yellow-red, green-yellow, blue-green, purple-blue, and red-purple.
Munsell hue is specified by selecting one of these simple ten hues, and then discussing the angle inside them from 1 to 10.
“Chroma” was measured out of the center of your wheel, with lower chroma being less saturated (washed out, for example pastels). Note that there is absolutely no intrinsic upper limit to chroma. Different parts of colour space have different maximal chroma coordinates. As an illustration light yellow colors have considerably more potential chroma than light purples, as a result of nature in the eye and the physics of color stimuli. This triggered a variety of possible chroma levels, plus a chroma of 10 might or might not be maximal according to the hue and value.
One is fully specified by 85dexupky the 3 numbers. As an illustration a relatively saturated blue of medium lightness could be 5B 5/10 with 5B meaning the color during the blue hue band, 5/ meaning medium lightness, and a chroma of 10.
The very first embodiment of the system (the 1905 Atlas) had some deficiencies as a physical representation of your theoretical system. These were improved significantly from the 1929 Munsell Book of Color and thru an extensive group of experiments done by the Optical Society of America inside the 1940’s causing the notations (sample definitions) for your modern Munsell Book of Color. The device remains widely used in a variety of applications and represents among the finest available data sets about the perceptual scaling of lightness, chroma and hue.
Advantages: A fairly simple system for comparing colors of objects by assigning them a collection of numbers based upon standard samples. Popular in practical applications including painting and textiles.
Disadvantages: Complementary colors are not on opposite sides, to ensure that one cannot predict the outcome of color mixing adequately.