This document provides an introduction to semiotics through discussing Ferdinand de Saussure and Charles Sanders Peirce. It explains that Saussure viewed language as a system of arbitrary signs composed of a signifier and signified. Peirce identified three types of signs: icons which resemble what they represent, indexes with a physical connection, and symbols based on social convention. Examples are used to illustrate how these theories help understand meaning in visual art through analyzing how color, marks, and images take on different meanings based on context.