Another
interesting peripheral vision experiment can be done at
night in
bed, if you have a
TV or anything else that keeps a
LED on.
Just try to look at the LED with your peripheral vision. You'll notice that the LED (no matter what color it is) looks white! This happens because the eye structures used to distinguish colors are concentrated on the central part of your field of view.
The hardest part on this experiment is convincing yourself that you're not seeing the color, since you already know what you're expecting to see.