What 's in our brain?

"Many people believe that color is a defining and essential property of objects, one depending entirely on the specific wavelengths of light reflected from them. But this belief is mistaken. Color is a sensation created in the brain. If the colors we perceived depended only on the wavelength of reflected light, an object's color would appear to change dramatically with variations in illumination throughout the day and in shadows. Instead patterns of activity in the brain render an object's color relatively stable despite changes in its environment."

Lothar Spillmann
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After spilmann's illusions: the color between the lines is identical. Do you see any difference?
Our brain is lying all the time ...