Red

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• Red#Colour of sunset

Template:Colorswatch Red is the color that is on the outside edge of the rainbow. It is one of the three primary colors, along with blue and yellow. Red light has a wavelength between 630 and 740 nanometers.

It is sometimes used to mark things that are wrong, important or dangerous.

Red is also commonly used as a warning to stop.

Meaning of red

• Red can represent passion, anger, rage or love.
• In many countries, a red light shows cars when they should stop.
• In politics, "red" is a symbol of Communism. The "Red Army" can refer to the army of the old Soviet Union, or the People's Republic of China. It is also related to the Red Brigade.
• Red is the color of heat and blood, so it is associated with energy, war, danger, strength, power, determination, as well as passion, desire and love.
• Red is an emotionally intense color. It is thought that it tends to raise blood pressure and make people breathe faster. It is very easy to notice, which is why stop signs, stoplights, and fire equipment are usually painted red. In heraldry, red is often used to indicate courage. It is a color found in many national flags.
• Red brings attention to text and images on the Internet.
• In advertising, red is often used to cause erotic feelings.
• Red is widely used to indicate danger.
• Red is associated with energy, so it may be used to promote energy drinks, games, cars, items related to sports and high physical activity.