The Additive Primary Colors White light incident on a prism is separated into a spectrum of colors. Remarkably, no combination of the other colors can produce red, blue or green. Place them in a single row. You will turn them ON and OFF selectively to fill in the chart below. The new colors in the above chart, magenta, cyan, and yellow are called secondary colors.
Secondary colors are colors that are produced by combining two primary colors.
This information can be reproduced in a Venn diagram to highlight the additive process of light mixing. Each circle in Fig. 2 represents the presence of one primary color of light. There are four regions formed by the overlapping circles. Note that only red and green are present in Region 1. We know that red and green combine to form yellow.