Aura is a type of energy that some people think exists around all living things, like people, animals, and plants. People that believe in auras say that this energy is always around us, and comes in different colors. Each color is said to affect the way a person behaves or feels. For example, a person with a blue aura might be very peaceful and relaxed, while a person with a red aura might be angry or sad. Although some people think that auras are real, there isn’t a lot of scientific evidence to back it up.