You don’t need a psychology degree to know that color affects us. Fast food joints use bright yellows, oranges and reds to convey energy and encourage customers to eat quickly. Cafés use dark greens, browns, blues or maroons to give an air of sophistication and comfort. If you do have a degree in psychology, you know color’s use and influence on our behavior is a popular area of research for scientists in the field. Hundreds of studies examine how we interact with the subtle messages of color.