When we think about camouflage, our minds turn to color first – an object should look like what it’s blending into. Ergo, if you want a plane to not be seen against the sky, paint it blue. During World War II, the U.S. Air Force took the opposite tack. The Spitfire was a common choice for reconnaissance missions, and many of those planes were painted a non-intuitive powder pink the color of a woman’s hatbox. Why? Well, the visible light that we see as blue down on the ground is actually filtered out and reflected, casting objects in the sky (like clouds) with a pinkish hue. These Spitfires flew missions at dawn and dusk, where they blended perfectly with cloud cover.