The study of colour III - JSS2 Cultural And Creative Art Past Questions and Answers - page 2

Primary colors (red, blue, and yellow) are the base colors that cannot be created by mixing other colors, whereas secondary colors (purple, orange, and green) are made by mixing two primary colors together.

Primary colors are crucial because they are used to create all other colors. Without primary colors, it would be impossible to generate the vast array of hues and shades seen in the color spectrum.