Red increases heart rate and blood pressure. It attracts attention, what makes it very popular for logos . Companies dealing with food, love it. They use it for their equipment, decor and it is also often added to food, because red makes you hungry.

Red makes you look bigger. The most famous story about the impact of color red is the one about English football team Liverpool, which supposedly improved its performance by far margin since they changed their sports dresses into all red.

Wearing a red dress is tricky. While it definitely attracts attention, it can also make you fatter. It is strongly recommended to avoid this color when negotiating, because even small a amount of red can make you looking hostile. Pink, as a paler shade of red, on the other hand, acts calming and is used in some correctional institutions to avoid riots (source: in prisons and penitentiaries.