In this paper, we present the thematic workshop “The Chemistry of Colors”, developed during a master degree research, and applied to students of the 3rd grade of high school, from a public school in Santa Maria/RS. The thematic workshop was the teaching methodology chosen to approach the scientific knowledge related to the theme colors. In this way, we intend to favor the process of teaching and learning. The results obtained in this research show that the teaching methodology developed helped the students to construct the scientific knowledge about light, electromagnetic spectrum, presence of color in ionic solutions, among others.