This illusion is pretty fascinating. It might actually point the way to a new discovery. The color constancy effect has been known for a long time, and there are many illusions around that show (to the same viewer) how a colored surface can appear to be one hue or another depending on the circumstances.
For decades, cognitive scientists slowly accrued a solid understanding of how people learn but never bothered to tell teachers and students what they had found. It is as if, says author Benedict Carey, "doctors had discovered a cure for diabetes and spent 50 years characterizing its molecular structure before giving it to a patient." He is attempting to rectify that.