The present disclosure relates to an optically colored body comprising at least one micelle, wherein the micelle comprises a liquid medium and colloid microcrystals having aggregates of spherical nano-particles and a cosmetic composition comprising the optically colored body. The present disclosure also relates to an optical structure comprising at least one substrate, and at least one wall that covers the at least one substrate and has optical transparency, wherein the space between the at least one substrate and the at least one wall is filled with colloid microcrystals having arrays of spherical nano-particles. Further, the present disclosure relates to a cosmetic composition comprising at least one optically colored body and/or at least one optical structure and a method for producing the optical structure.