Totally different from the standard idea that binary photonic crystals can solely reproduce combined colours because of the easy superposition of the photonic band gaps, exactly addressable “true colours” obtained from quantity fraction deviation of binary photonic crystals with metastable buildings are reported right here. Impressed by the mussels’ adhesion and longhorn beetles’ photonic scales, a binary metastable amorphous photonic crystal was obtained by enhancing the driving forces and customizing the floor roughness of constructing blocks to manage the thermodynamic and dynamic elements concurrently. By controlling the amount fraction of two constructing blocks, the tunable photonic bandgap varies linearly within the seen area. Moreover, the “true violet” that can’t be obtained by standard coloration mixing is reproduced with the actual ultraviolet traits of purple photonic pigment’s metastable buildings, which counterpoint the palette impact of “true colours”. In the meantime, because of the self-adhesion and post-modification of constructing blocks, the steadiness of photonic pigments is additional improved. The binary photonic pigments not solely remedy the dilemma of combined colours, but in addition notice the tunability and multiplicity of “true colours”, providing a brand new alternative for the colour palette of the world.
