Color makes its way into natural science images as early as the research process. It serves for self-reflection and for communication within the scientific community. However, color does not follow a standard in the natural sciences: its meaning is contingent, even though culturally conditioned. Digital publishing enhances the use of color in scientific publications; at the same time, globalization promotes the idea of universal color symbolism. This book investigates the function of color in historical and current visualizations for scientific purposes, its epistemic role as a tool, and its long neglect due to symbolic and gender-specific connotations. The publication thus closes a research gap in the natural sciences and the humanities.