RYB color model

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. RYB (an abbreviation of red-yellow-blue) is a historical set of subtractive primary colors. It is primarily used in art and design education, particularly painting. It predates much of modern scientific color theory. RYB make up the primary color triad in a standard artist's color wheel. The secondary colors VOG (violet-orange-green) also make up another triad. Triads are formed by 3 equidistant colors on a particular color wheel. Other common color wheels represent the light model (RGB) and the print model (CMYK). In his experiments with light, Isaac Newton recognized that colors could be created by mixing color primaries. In his Opticks, Newton published a color wheel to show the geometric relationship between these primaries. This chart was later confused and understood to apply to pigments as well, though Newton was also unaware of the differences between additive and subtractive color mixing.