Perceptual Constancy- Brightness Constancy

This concept allows us to know that a color is the same color, regardless of what kind of lighting it is under.

We know that we wore blue jeans this morning, but on the bus on the way to school they appear black because of the dim lighting on the bus.

Brightness Constancy also explains how we may perceive colors to be different at certain times. Like in a dimly lit store (cough cough Hollister cough) we may see this awesome brown shirt, but when we walk out it is actual maroon.