The aim of this article is twofold: to make semioticians interested in visual semiotics better acquainted with the very elaborate aspects of color theory, from which they could take models to develop other aspects of visual semiotics, and to make color theorists more familiar with general semiotics, a paradigm that can encompass and organize the whale study of color. General semiotic notions are described and illustrated with examples taken from the domain of color, and an account of some of the advances of color theory is given within the framework of semiotic categories. Aspects such as color semantics, color grammar, color harmony, color combinations, and others, are reviewed.