Morpho butterflies wings color modeled with lamellar grating theory

We describe an approach for converting reflection coefficients of any struc ture into colors, taking into account human color perception. This procedur e is applied to the study of the colors reflected by Morpho rhetenor butter flies wings. The scales of these wings have a tree-like periodic structure which is modeled with the help of a rigorous lamellar grating electromagnet ic theory. In this way, we are able to determine the colors reflected by th e wing under various illumination conditions.