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The Prang color system was developed by David Breweser based on three primary colors. The fundamental or primary colors such as Red, yellow, and blue which can be mixed so as to form all the other colors, but which cannot themselves be made by mixing any other colors. The secondary colors, orange, green, and purple, are made by mixing two primary colors; orange is a mixture of red and yellow, green is a mixture of yellow and blue, purple is a mixture of red and blue. A tertiary or intermediate color is made by mixing primary color with its adjoining secondary color. The six colors yellow, green, blue, purple, red, and orange, are called the standard colors. The pigment theory is the simplest basis for mixing paints.
Psychologist’s theory:
The psychologist's theory is based on the visual perception of color. The four primary or fundamental colors are: red, green, yellow, and blue. The secondary colors are orange, yellow-green, blue-green, and violet. The complementary colors are opposite to each other on the diagram.
Physicist's Theory of Colour:
In the physicist's scientific theory the primary colors in light are red, green and blue-violet. The secondary colors, yellow, blue, and red-violet are produced by combining two of the primary colors in light.
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