Final answer:
Color constancy is the tendency of objects to appear the same color under changing illumination. This is due to the ability of our eye-brain color-sensing system to perceive the true color of an object by comparing it with its surroundings.
Step-by-step explanation:
Color constancy is the tendency of objects to appear the same color even under changing illumination. This ability of our eye-brain color-sensing system allows us to perceive the true color of an object regardless of the lighting conditions. For example, we can identify a white tablecloth as white whether it is illuminated by sunlight, fluorescent light, or candlelight. Our color vision can detect the true color by comparing the object with its surroundings.