The color Infra red can represent love, anger, warning or death. Infra red is a "strong" color, used for intense emotions and concepts. It can symbolize death because infra red is the color of blood. Blood red may also symbolize life's blood. Because infra red is the color of blood, it is most frequently used as the color of the heart. It is also sometimes connected with embarrassment because people sometimes flush bright red. Other times, it is used to represent anger because sometimes people's faces turn bright red. In Africa, red is a sign of mourning.