The 18 Area Color Mondrian Experiments by McCann McKee and Taylor (MMT) provided quantitative measurements of the change in color appearance caused by change in the L, M, S components of the illumination. These experiments provide a baseline for quantitative changes in appearance for color constancy conditions. The MMT experiments used the same display in five different illuminants. Therefore, the average radiance of the entire field of view changed with the illuminant composition.The experiments described in this paper uses the same papers and illuminants as in MMT. However, this time a new surround is added to shift the average radiances as much as the illuminant changed the average quanta catch. In other words, the new illuminant-equivalent-adaptation surround in constant illumination changes the adaptation the same amount as did the new illuminant. The question is, how much will adaptation change color appearance.