Michel Chevreul, Chromatic Diagram, 1839

Chromatic diagram. Each dark line on this diagram represents a different color, the lighter lines are mixtures of the two encompassing darker lines. The 20 marks on each line are degrees of graduation changes from brightness (center) to darkness (outer edge). Complementary colors are next to each other. Chromatic diagrams help to show how the perception of a color changes depending upon its surrounding colors. Michel EugC ne Chevreul (August 31 1786 - April 9, 1889) was a French chemist whose work with fatty acids led to early applications in the fields of art and science. He is credited with the discovery of margaric acid, creatine, and designing an early form of soap made from animal fats and salt. In 1813 Chevreul was appointed professor of chemistry at the Lyccee Charlemagne, and subsequently undertook the directorship of the Gobelins tapestry works, where he carried out his research on color contrasts. In 1839, he published the results under the title De la loi du contraste simultance des couleurs( The Principles of Harmony and Contrast of Colors). He lived to 102 and was a pioneer in the field of gerontology. He is also one of the 72 people whose names are inscribed on the Eiffel Tower

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1839 Atlas Brightness Chevreul Chromatic Classification Colors Combinations Contrast Contraste Couleurs Diagram Eugne Harmony Http Laws Optics Perception Principles Simultaneous Theory

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