In this illusion, the second card from the left seems to be a stronger shade of pink in the top picture. In fact they are the same colour, but the brain changes its assumption about colour due to the colour cast of the surrounding photo. (This is a photo of the Author)
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In this illusion, the second page looks pink in the top picture, but biege in the lower one. In fact they are the same colour, but the brain changes its assumption due to the colour cast of the surrounding photo.
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