borntobesting:
Then you didn't pay too much attention to your science teacher or if you did he or she didn't have a clue about what she was saying. White is the absence of all color and black is the combination of all colors. Don't believe it, just take several different colors of crayons and go over the same area. Soon it will be almost if not completely black.
Black is the absence of color. You prove it with your crayon experiment.
You see when you color with a yellow crayon, you block other light (colors) from reflecting back from the paper. Then when you color on top of that yellow with blue, then red, etc etc you eventually block all the light from being reflected. So now you see black because no colors (light) are coming back from that piece of paper in that spot. Thus black is the absence of color.
White is the opposite situation.