The science and art of color theory is divided by a wheel or chart into three main categories: primary, secondary and tertiary. Color is something we perceive through a combination of wavelengths ...

Jerry Cao is a UX content strategist at UXPin — the wireframing and prototyping app. To learn more about how to create visually digestible interfaces, download the free e-book Web UI Design for the ...

Two folds from an Astrolin Color Card pamphlet by Établissement Georget Fils Peintures Laquées et Vernis, Chantenay-Lès-Nantes (c. 1906), 6 3/10 x 3 3/4 inches (image courtesy Bibliothèque Forney, ...