Surprisingly, their chromatophores contain only red, orange, yellow, black, or brown pigments, yet cephalopods exhibit a full rainbow of colors. The mystery of how they do this was solved when scientists discovered that they also have reflecting cells in their skin that act like mirrors or prisms. These iridophores and protein-based leucophores are used in combination with their chromatophores to create a wide variety of striking colors that include vibrant blues, purples, greens, and silver.

