So even in this simple example, it is impossible to be completely accurate in color reproduction. Then he simultaneously projected the resulting images in register, the first through a red filter, but the second with ordinary white light, unfiltered. Amazingly this produces the perception of a full color image. Our perception is also very adaptive to the color of the light the subject is viewed under. For instance, consider scenes illuminated by different light sources, such as florescent, tungsten, and daylight.
Most florescent lights are quite greenish, tungsten is very red, and daylight, normal.
Recorded on film, these scenes will have the color bias of the light source, which, if considered objectively, we would have to say is correct. But viewed in a photograph, which is subjective, we would consider the lighting in such scenes as wrong. Experienced amateur astronomers realize that very few objects will show any color at all visually, even in the largest telescopes. This is because most objects are just not bright enough to stimulate the eye's cone cells in the center of the retina in the fovea centralis. The cones are the light sensitive cells we use in the daytime when there is plenty of light and they give us our sharp direct vision, and they also see colors.