https://www.domestika.org/en/courses/2135-color-theory-applied-to-online-projects

Learn the science behind color to create engaging and cohesive digital designs that improve communication
Color plays a crucial role in the communication process, as it establishes a deep connection with the audience through human psychology and cultural context. Branding and UX expert James Eccleston has found in color one of the most powerful tools for solving problems through design.
In this course, learn the big ideas behind color theory and learn how to apply them in your own digital designs. This course will enable you to be a more complete designer by giving you the tools you need to communicate with color and analyze other designers’ work in terms of color.