Blue color in living things

Blue color in living things
There are nearly ten million species of living things on the face of the blue planet. However, blue is one of the rare colors in which creatures are colored. Even the blue whale is not blue. To find out the secret of the blue color in some organisms, the researchers studied the structure of the wing in the blue morpho butterfly, Morpho peleides. .
Despite its name, its wings aren't actually blue! It does not contain dyes. The bright blue color in the wings of the butterfly results from the diffraction of light from millions of minute nanoscales on the scales of the chitinous butterfly, which are lined in thin layers resembling a Christmas tree, ranging in size from 0.0010 millimeters. The butterfly during the spread of the wings, and when the contraction of the path of light bends back to the original brown color of the wing.