A new study has used magnetoencephalography to track cortical responses color as they emerge in time. Similarities and differences within these neural parallel characteristics of the perceptual experience color. It is still common describe vision terms two stages. In first, light spectrum sampled by three classes retinal cone receptors with different spectral sensitivities. second, signals are ...

Agarwal introduced $n$-color compositions in 2000 and most subsequent research has focused on restricting which parts are allowed. Here we focus instead allowed colors. After three general results, giving recurrence formulas for the cases of given colors, prohibited colors satisfying modular conditions, consider several more specific establishing direct connections to other combinatorial object...