Biomimicry

"Most of us were born and will die a certain color, but octopuses are masters of their hue, changing from transparent to shades of red, pink, purple and blue by stretching and relaxing their skin. If we could unlock their secret and wrap our buildings in octopus skin, then city skylines might shimmer a spectrum of colors and opacities as the sun waxed and waned."

"The rare blue morpho butterfly is among the largest butterflies in the world and one of the most spectacular with its brown wings that suddenly turn iridescent blue. This amazing display happens when blue light reflects off the layers of microscopic scales on its wings. 3M scientists studied the butterfly to mimic this effect in a window film."