Humans possess colour constancy, a fundamental  characteristic of the visual system which compensates for changes in illuminant colour in order to keep object colours stable. The two images above depict the same array of objects ("Mondrian Ellipsoids") under two different illuminants -- a bluish illuminant on the left and a yellowish illuminant on the right. The green ellipsoid in the centre reflects a different spectrum of light to the eye under the two different lighting conditions, and the camera faithfully records this difference. But a normal human observer viewing the scene would perceive little change in the colour of the ellipsoids as the light changed from blue to yellow. The mechanisms which underlie colour constancy are still not entirely understood, but most probably include chromatic adaptation in the retina  as well as higher level mechanisms that may require image analysis and memory.