Do you know how RED Colors everything red?

RED: wavelength range of approximately 630–700 nm
Is the wavelengths longer than this, then its called infrared
Red is an additive primary color, complementary to cyan.



red is associated with: the heat of sun, fire, blood, rage, heat,
ripe fruit, guilt, sin, satan, dominance, courage, sacrifice,
indicating danger, emergency, heart, love,
China, communist, Red Cross, socialists, revolutionair,



Red carries the strongest reaction of all the colors
Because of this, red is often used to catch people's attention
Emergency exits on passenger aircraft are indicated by red signs and lighting.

The port, or left, side of a sea-going vessel carries a red navigation light,
to warn other vessels approaching from that side to change course to avoid a collision.
Also stop signs, traffic signals, brake lights
In auto racing, a red flag signals all cars to immediately stop.
In Association football, the referee shows a red card to a player who is being sent-off.



Red is one of the most common colors used on national flags. The use of red has similar connotations from country to country: the blood, sacrifice, and courage of those who defended their country; the sun and the hope and warmth it brings



If the skin of animals is more or less red or have red spots or stripes this means keep distance, we are dangerous, we even might be toxic



Some idioms, expressions with red:
Red Indians is a British term for Native Americans.
redhot, a red rag= becoming angry,
a redletter day, started out in the 15th century, feast & saints days marked red on calenders
Red ink is also used to denote debt, "in the red" usually indicates economic losses
In North American stock markets, red is used to denote a drop in stock prices.



Red is the color of heat and fire.
Taps for hot water are often labeled red.
Red is commonly the color of fire alarm boxes,
fire extinguishers, and the firefighter profession itself.



Being the color of blood, red was associated with the Roman mythology god of war, Mars,
and the reddish planet Mars became named after him.



In Chinese symbolism, red is the color of good luck and is used for decoration and wedding attire.
Money in Chinese societies is traditionally given in red packets.
In East Asian stock markets, red is used to denote a rise in stock prices.



Red is the color used for critical or important systems (such as emergency lighting) that operate in low-light or night-time conditions, as rod cells in the human eye do not respond to it and therefore does not interfere in the eye's ability to focus in dim environments.