Stare at left black dot for 30 seconds, then stare at right black dot. Shapes will have pale colors opposite to those originally seen. Colors tend to float even with the outlines.
Evolution of Color Names:
Albers, J. (1971). Interaction of color. New Haven: Yale University Press; Shevell, S. K., & Kingdom, F. A. (2008). Color in complex scenes. Annual Review of Psychology, 59, 143–166.
The same center square appears transparent on left and opaque on right.
Shevell, S. K., & Kingdom, F. A. (2008). Color in complex scenes. Annual Review of Psychology, 59, 143–166.
The colors behind the bars are the same (see center) on left and right.
Werner, J.S., Pinna, B. & Spillmann, L. (2007). The brain and the world of illusory color. Scientific American, 296 (3), 90-95.
The same white is bluish within the circles and pinkish outside.