... with only weiskeipigment, the resulting colour is purple/pink. With only sarpedobilin, a cyan colour results, but adding an increasing amount of weiskeipigment will progressively suppress the red part of the reflectance spectrum, causing a deep blue colour. The weiskeipigment thus performs an alternative...

... characteristics of thin film reflectors, allowing simultaneous spectral and polarization changes, which may be important in intraspecific communication. Reflectance spectrum Structural coloration Wing scales Color vision Polarization vision European Office of Aerospace Research and Development...