The color of eggshells helps mothers identify their own kind and/or camouflage them with their environment.
The dusky dottyback is dressed to kill: It shape-shifts to look like its prey and goes in for the attack.
Hawkmoths not only have excellent night vision, but they can distinguish between colors in the dark.
Have you ever heard the color blue? Or tasted the musical note F-sharp?
Did you know that florescent lighting affects the look of color (including makeup!)
This is partly due to pollution, but even in the cleanest air the sky is lighter near the horizon due to the effect of earth's atmosphere on sunlight.
When we are in a fairly dark room, or outside at night away from lights, we can still see, but we can't see the colors of things very well. Why is that?
Clouds can range in color from brilliant white to almost black. Why?
Some people report seeing colors when they read text or tasting flavors when they listen to music. Elevated neuronal responsiveness could be to blame.