Patent ID: 8323391

Claim:
A paint composition comprising: a binder and an omnidirectional structural color pigment dispersed throughout said binder to form a paint, said omnidirectional structural color pigment made from a plurality of flakes having a multilayer structure with a first layer of first material having a first predefined thickness d H and a first index of refraction n H between 1.75 and 3, and a second layer of a second material having a second predefined thickness d L and a second index of refraction n H between 1 and 3: said first predefined thickness d H and said second predefined thickness d L predefined such that said multilayer structure has a reflection band of less than 200 nanometers and a dispersion of a center wavelength Δλ c of said reflection band defined as: Δλ c = λ c ⁢  θ 0 = 0 ° ⁢ - λ c  θ 0 = 45 ° = 2 ⁢ ( n H ⁢ d H 1 + n L ⁢ d L 1 - n H ⁢ d H 1 - n 0 2 n H 2 - n L ⁢ d L 1 - n 0 2 n L 2 ) is less than 200 nm when said multilayer stack is viewed from 0 degrees and 45 degrees and where λ c at θ 0 =0° is a center wavelength of said reflection band when said multilayer stack is viewed from 0°, λ c at θ 0 =45° is a center wavelength of said reflection band when said multilayer stack is viewed from 45° and n 0 is a refractive index of a medium beyond said multilayer structure.