A new study gives new meaning to being blue — or red — in the face. People can pretty accurately discern whether someone is a Democrat or Republican just by looking at their mugs, according to research by two Tufts University social psychologists. In a series of experiments, college students were shown headshots of people and asked to guess their party affiliation. The students were correct 60% of the time, according to the study, greater than random chance would indicate. The researchers said students made their decisions based on their stereotypes of what Republicans and Democrats looked like.