Color is energy made visible. It activates an ancient circuit that lights up with pleasure at the idea of finding something sweet to eat. Now, in a world that contains rainbows of artificial colors, we still feel the same joy, even if a colorful object contains no physical nourishment. More broadly, color is an indication of the richness of our surroundings. It is an unconscious signal not only of immediate sustenance but of an environment that is capable of sustaining us over time.
