This paper adopts the interdisciplinary theoretical framework of "Color Sociology" to explore how color transcends its aesthetic significance and fulfills social functions. It begins by outlining the theoretical foundations of Color Sociology and examines typical cases of public art in Shanghai to discuss the strategic application of color in public art. Finally, the study focuses on the pivotal role of curators in public art projects, revealing how they employ the principles of Color Sociology in project planning and narrative construction, thereby translating theory into practical forces that promote social dialogue and cultural innovation.