If you had the same high school science class I did, you learned that light waves are not actually colored—the objects we see appear to our brains to be the color that they reflect, and not the color they absorb. So a green plant absorbs all of the red and blue light waves, and reflects all of the green light. (I always found that hard to keep straight, because it is so “inside out” from how it seems intuitively.) But knowing that visible light is made up of red, green and blue (RGB) is an important base to understanding color in general. Read more