THE COLOR OF AN OBJECT DEPENDS ON BOTH THE PHYSICS OF THE OBJECT IN ITS ENVIRONMENT AND THE CHARACTERISTICS OF THE PERCEIVING EYE AND BRAIN.
Physically, objects can be said to have the color of the light leaving their surfaces, which normally depends on the spectrum of the incident illumination and the reflectance properties of the surface, as well as potentially on the angles of illumination and viewing. Some objects not only reflect light, but also transmit light or emit light themselves, which also contributes to the color.