Encyclopedia of Color Science and Technology

Living Edition
| Editors: Ronnier Luo


  • Simone Gori
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27851-8_272-1



Color assimilation is somewhat considered the opposite of the color contrast: the color is perceived in the direction of the hue of the surrounding color, whereas in color contrast the perceived color tends to be the complementary color. Assimilation can be experienced also in grayscale stimuli and it is called lightness assimilation or brightness assimilation. In this case a gray is perceived lighter if it is close to a light object and darker if it is close to a darker object which is, again, the opposite of the simultaneous contrast.


According to a naive physicalism, the physical stimulus should present a direct relationship with its mental correlate. Visual illusions (e.g. [1, 2, 3]) indicate, however, that physical manipulations of a stimulus do not directly determine the perceptual experience [4]. The existence of visual illusions has been already reported by ancient philosophers and they were...


Receptive Field Color Contrast Visual Illusion Assimilation Effect Illusory Motion 
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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Human and Social SciencesUniversity of BergamoBergamoItaly
  2. 2.Developmental Neuropsychology UnitScientific Institute “E. Medea”, Bosisio PariniLeccoItaly