Filtering of White Light by Cyan:

The RGB colour model is specifically important because it is the basis for control of most colour monitors. For this purpose it is also the preferred colour model for graphics languages and image processing programs. A typical interactive RGB colour picker for choosing the three colour coordinates is shown in Figure.

Figure

Filtering of White Light by Cyan, Magenta, and Yellow Filters

In this subtractive produce, the magenta filter subtracts green light out of the white beam, leaving only its complement, magenta. Subtracting all three colours leaves no light at all, black.