Red is a very symbolic color in many different forms of expression, and it has been for centuries.
"Dramatic, energetic, brave, dangerous, determined, passionate.
Red is an extremely intense color. It symbolizes life - red is the color of blood, war and Mars. Simply looking at the color can enhance our metabolism, increase respiration rate and raise blood pressure. It makes us stop in our tracks. It is the color of a strong will and determination. It can awaken us - give us confidence and power.
Red is the color of sexuality and can stimulate hedonism. Being surrounded by too much of red can make us feel angry. Too little and we can become weak."
Source:
http://www.archetypes.com/article/archetype-mystery-color/