If the primary colors of computer monitors is RGB, then how do they produce the color yellow? Simple. Computer monitors create color by utilizing the “additive” method. The color YELLOW is created by adding full-strength red and full-strength green. Adding two-thirds strength blue gives us a lighter (not darker) yellow. Full-strength blue, red, and green produce bright white. This is a counterintuitive result if you learned your color-mixing skills in kindergarten. But we know that white light can be broken into all the colors of the rain-bow. So we shouldn’t be surprised to learn the process also works in reverse — i.e, the colors of the rainbow can be combined to make white. Besides, it only stands to reason that the more light you shed on something, the brighter (that is, closer to white) it gets.