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Red - Wikipedia Red is the color at the long wavelength end of the visible spectrum of light, next to orange and opposite violet It has a dominant wavelength of approximately 625–750 nanometres [1] It is a primary color in the RGB color model and a secondary color (made from magenta and yellow) in the CMYK color model, and is the complementary color of cyan
Red | Description, Etymology, Facts | Britannica Red, in physics, the longest wavelength of light discernible to the human eye It falls in the range of 620–750 nanometers in the visible spectrum In art, red is a color on the conventional wheel, located between violet and orange and opposite green, its complement
The Color Red — History, Meaning and Facts | HunterLab The History of the Color Red More than 40,000 years ago, hunters and gatherers used red clay to make paint The Paleolithic people buried their dead with red powder for protection from evil spirits Red is also common in ancient art, with cave paintings across continents created by red ochre