Why are the primary colors different from the colors of light?

You may have learned that the colors red, yellow, and blue are called primary colors. It’s sometimes said you can use those three to make all the other colors. But can red, yellow, and blue really mix to make any color, or is there more to the story?  We asked color scientist Stephen Westland to help us find the answer. Got a question that came up out of the blue? Send it to us at BrainsOn.org/contact, and we’ll help find a CYAN-tific answer! See omnystudio.com/listener for privacy information.