Disclosed herein are representative embodiments of tools and techniques for setting color settings of an operating system using one or more photographs. According to one exemplary technique, a photograph is received, and one or more pixel weights for one or more pixels of the photograph are determined. Also, using at least one of the one or more pixel weights, at least one dominant color of the photograph is determined. Additionally, using the at least one dominant color, at least one color setting of an operating system is set.