Baumann's new color card system Prase is a historical color system that was formulated strictly on the color model of Wilhelm Ostwald. The first edition was published in 1912. In the color system, both the colors and their recipes are given from natural pigments, a treasure for the color developer.
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Primary colors are blue, red and yellow. These are pure colors that have no component other than themselves. Secondary colors are orange, green and purple. These are composed of the primary colors on either side of it on the color wheel. i.e. Orange = red