Illusory colour changes in Hermann grids varying only in hue.
D003116:Color; D003118:Color Perception / Q000502:physiology*; D003117:Color Vision Defects / Q000503:physiopathology; D005260:Female; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008297:Male; D009903:Optical Illusions / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology