When your eye fatigues, your eye creates an exact opposite Hue, Value, and Intensity of what you are viewing. Focus on the black dot in the middle of the bottom box for 15 seconds.Then focus on the black dot in the top square of your screen. What colors do you see on the white background? What you should see is the exact opposite Hue. Students were asked to design their own Afterimage in order to learn the concept and to help them learn the value of learning color theory for their work.