" Different things are different colors because they absorb some wavelengths of the visible light spectrum, while others bounce off. So the tomato’s skin is soaking up most of the short and medium wavelengths—blues and violets, greens, yellows and oranges. The remainder, the reds, hit our eyes and are processed by our brains. So, in a way, the color we perceive an object to be is precisely the color it isn’t: that is, the segment of the spectrum that is being reflected away. "

― , The Secret Lives of Color