1. A computer implemented method, comprising: generating, using a processor, a set of calibration data relating to a plurality of pigments that are present in a collection of coatings, wherein generating includes: calculating an absorption/reflectance relationship of a plurality of samples coated with a plurality of the pigments, wherein calculating includes using a color matching calculation; calculating a plurality of concentrations of a non-standard pigment; plotting a relationship between the concentrations and the absorption/reflectance relationships; determining a correlation of the concentrations for a plurality of Fresnel coefficients relating to the samples; and determining, using the processor, a coating formulation of a target coating based on the correlation.