Dan-Ball's color illusions use the effect of an negative afterimage, or ghost image to colorize a normal black and white image. This afterimage illusion is used in combination with the normal black and white image to colorize it.

The player stares for about 30 seconds at a fixed black point in the center of a negative of the image's colors. The cone cells in the retina of the human eye get overstimulated and lose sensitivity. When looking on a blank surface, these cone cells remain sending out a weaker signal in contrast to the cone cells which were not affected. Therefore, a negative color image appears.

List of color illusions

External Links

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