Non-color shifting multilayer structures and protective coatings thereon

An omnidirectional structural color pigment having a protective coating comprising:

• a pigment having a reflector layer, a dielectric layer with a thickness of less than 2.0 quarter wave (QW) of a desired reflected center wavelength extending across said reflector layer and an absorber layer extending across said dielectric layer, said reflector layer, dielectric layer and absorber layer being substantially planar layers, said pigment reflecting a single band of visible electromagnetic radiation having a predetermined full width at half maximum (FWHM) of less than 200 nm and a predetermined color shift of less than 30° when said pigment is exposed to broadband electromagnetic radiation and viewed from angles between 0 and 45°;
• a weather resistant coating comprising an oxide layer covering an outer surface of said pigment and reducing a photocatalytic activity of said pigment by at least 50% compared to said pigment not having said weather resistant coating.