About this app

Six pigments defined by reflectance across eight spectral bands rather than by an RGB triple, mixed three ways — weighted absorbance, straight multiplication, and the naive RGB average nearly every colour picker uses. Shows the subtractive and additive result side by side for the same mixture, so the divergence is the exhibit. Makes the underlying point: pigments do not have colours, they have absorption spectra, and the colour is whatever light is left over.