english: The more primitive part of our visual cortex, which sees light contrast and motion, but not color, will blend two differently colored areas together if they have the same luminance.
non_english: Primitivniji deo našeg vizuelnog korteksa, koji vidi kontraste svetlosti i kretanje, ali ne i boju, stopiće dve različito obojene oblasti u jednu ako imaju istu osvetljenost.