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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 625–740 nanometres. 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.
The color is defined as red in the NCS or Natural Color System (NCS 1080-R). The Natural Color System is a color system based on the four unique hues or psychological primary colors red, yellow, green, and blue. The NCS is based on the opponent process theory of vision.
Red pigments are materials, usually made from minerals, used to create the red colors in painting and other arts. The color of red and other pigments is determined by the way it absorbs certain parts of the spectrum of visible light and reflects the others.
Red is any of a number of similar colors evoked by light, consisting predominantly of the longest wavelengths discernible by the human eye, in the wavelength range of roughly 625–750 nm. It is considered one of the additive primary colors .
Category:Shades of red. Wikimedia Commons has media related to Types of red. Various shades of the color red. This category is for all varieties, not only shades in the technical sense. See also the categories Shades of magenta and Shades of pink.
Iron oxide red is a generic name of a ferric oxide pigment of reddish colors. Multiple shades based on both anhydrous Fe. 2O. 3 and its hydrates were known to painters since prehistory. The pigments were originally obtained from natural sources, since the 20th century they are mostly synthetic.
The theory of color includes the color complements; color balance; and classification of primary colors (traditionally red, yellow, blue), secondary colors (traditionally orange, green, purple) and tertiary colors. The study of colors in general is called color science.
Carmine color is the general term for some deep red colors that are very slightly purplish but are generally slightly closer to red than the color crimson is. Some rubies are colored the color shown below as rich carmine .
Venetian red Color coordinates; Hex triplet: #C80815: sRGB B (r, g, b) (200, 8, 21) HSV (h, s, v) (356°, 96%, 78%) CIELCh uv (L, C, h) (42, 136, 12°) Source: ColorHexa: ISCC–NBS descriptor: Vivid red: B: Normalized to [0–255] (byte)
Crimson is a rich, deep red color, inclining to purple. [2] It originally meant the color of the kermes dye produced from a scale insect, Kermes vermilio, but the name is now sometimes also used as a generic term for slightly bluish-red colors that are between red and rose. It is the national color of Nepal .