rgb / cmy   

  hue, value, saturation   

  exploration   

Can you draw a color wheel? Do you remember how Red, Green, Blue and Cyan, Magenta, Yellow relate to each other around the circle?

Do you remember what ROY G. BIV stands for?

If you were taking pictures under fluorescent light which had a green color cast, what color filter would you use to neutralize it? Go back to the color wheel if you can't remember.