The Munsell color product is a color system that specifies colors according to three color dimensions, hue, value, and chroma (difference from gray at a given hue and lightness).
Professor Albert H. Munsell, an artist, wanted to produce a “rational way to describe color” based on the principle of “perceived equidistance”, and therefore would use decimal notation instead of color names (that he felt were “foolish” and “misleading”). He first started work towards the device in 1898 and published it 100 % form in Color Notation in 1905. The munsell soil color chart continues to be 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 bring about an achromatic mixture.
The program contains an irregular cylinder using the value axis (light/dark) running up and down through it, as does the axis of your earth.
Dark colors are at the bottom of your tree and light-weight towards the top, measured from 1 (dark) to 10 (light).
Each horizontal “slice” of your 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, after which referring to the angle inside them from 1 to 10.
“Chroma” was measured out from the center of your wheel, with lower chroma being less saturated (washed out, such as pastels). Note that there is no intrinsic upper limit to chroma. Different aspects of the hue space have different maximal chroma coordinates. As an example light yellow colors have significantly more potential chroma than light purples, due to nature of your eye along with the physics of color stimuli. This triggered an array of possible chroma levels, as well as a chroma of 10 might or might not be maximal dependant upon the hue and value.
One is fully specified by 85dexupky three of the numbers. As an example a reasonably saturated blue of medium lightness could be 5B 5/10 with 5B meaning the color in the midst of the blue hue band, 5/ meaning medium lightness, and a chroma of 10.
The original embodiment of your system (the 1905 Atlas) had some deficiencies as a physical representation of your theoretical system. They were improved significantly within the 1929 Munsell Book of Color and through a thorough combination of experiments carried out by the Optical Society of America inside the 1940’s causing the notations (sample definitions) to the modern Munsell Book of Color. The device remains traditionally used in a variety of applications and represents one of the better available data sets around the perceptual scaling of lightness, chroma and hue.
Advantages: A somewhat simple system for comparing colors of objects by assigning them a set of numbers according to standard samples. Widely used in practical applications such as painting and textiles.
Disadvantages: Complementary colors are not on opposite sides, in order that one cannot predict the final results of color mixing adequately.