This article is about the color. Chinese honor guard in column 070322-F-0193C-014. Red is the color bright red hair dye the end of the visible spectrum of light, next to orange and opposite violet. Red pigment made from ochre was one of the first colors used in prehistoric art.
Roman generals had their bodies colored red to celebrate victories. It was also an important color in China, where it was used to colour early pottery and later the gates and walls of palaces. Since red is the color of blood, it has historically been associated with sacrifice, danger and courage. Modern surveys in Europe and the United States show red is also the color most commonly associated with heat, activity, passion, sexuality, anger, love and joy. In China, India and many other Asian countries it is the color of symbolizing happiness and good fortune. Pure, or solid red, the color of most ripe raspberries.
Scarlet is one quarter of the way between the colors red and orange. It is the colour worn by a cardinal of the Roman Catholic Church. The cardinal takes its name from the colour worn by Roman Catholic cardinals. Pink is a pale shade of red. Cherry blossoms in the Tsutsujigaoka Park, Sendai, Miyagi, Japan.
Vermilion is similar to scarlet, but slightly more orange. Some Hindu women put a stripe of sindoor in their hair to show they are married. Crimson is a strong, deep red containing a little blue. Maroon is a dark brownish red.
Its name comes from marron, the French word for chestnut. Ruby is the colour of a cut and polished ruby gemstone. Burgundy, claret, or Wine red, is a very dark red containing a little blue. In France this colour is known as Bordeaux. Lists of shades of red and shades of pink are found at the end of this article. Bulls, like dogs and many other animals, have dichromacy, which means they cannot distinguish the color red. They charge the matador’s cape because of its motion, not its color.
The human eye sees red when it looks at light with a wavelength between approximately 625 and 740 nanometers. Bulls, for instance, cannot see the red color of the cape of a bullfighter, but they are agitated by its movement. One theory for why primates developed sensitivity to red is that it allowed ripe fruit to be distinguished from unripe fruit and inedible vegetation. This may have driven further adaptations by species taking advantage of this new ability, such as the emergence of red faces. Red light is used to help adapt night vision in low-light or night time, as the rod cells in the human eye are not sensitive to red. Today modern darkrooms usually use an amber safelight.
On the color wheel long used by painters, and in traditional color theory, red is one of the three primary colors, along with blue and yellow. In modern color theory, also known as the RGB color model, red, green and blue are additive primary colors. Red, green and blue light combined together makes white light, and these three colors, combined in different mixtures, can produce nearly any other color. So that the maximum number of colors can be accurately reproduced on your computer screen, each color has been given a code number, or sRGB, which tells your computer the intensity of the red, green and blue components of that color. The intensity of each component is measured on a scale of zero to 255, which means the complete list includes 16,777,216 distinct colors and shades. In a traditional color wheel from 1708, red, yellow and blue are primary colors.