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Blue is one of the three primary colours in the RYB colour model, as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called Tyndall effect explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective.
A set of primary colors or primary colours consists of colorants or colored lights that can be mixed in varying amounts to produce a gamut of colors. This is the essential method used to create the perception of a broad range of colors in, e.g., electronic displays, color printing, and paintings. Perceptions associated with a given combination of primary colors can be predicted by an appropriate mixing model that reflects the physics of how light interacts with physical media, and ultimately the retina.
Magenta is a color that is variously defined as pinkish-purplish-red, reddish-purplish-pink or mauvish-crimson. On color wheels of the RGB (additive) and CMY (subtractive) color models, it is located exactly midway between red and blue. It is one of the four colors of ink used in color printing by an inkjet printer, along with yellow, black, and cyan, to make all other colors. The tone of magenta used in printing is called "printer's magenta". It is also a shade of purple.
A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compounds. Pigments of prehistoric and historic value include ochre, charcoal, and lapis lazuli.
Political colours are colours used to represent a political ideology, movement or party, either officially or unofficially. It is the intersection of colour symbolism and political symbolism.
A color term is a word or phrase that refers to a specific color. The color term may refer to human perception of that color which is usually defined according to the Munsell color system, or to an underlying physical property. There are also numerical systems of color specification, referred to as color spaces.
Hand-colouring refers to any method of manually adding colour to a monochrome photograph, generally either to heighten the realism of the image or for artistic purposes. Hand-colouring is also known as hand painting or overpainting.
Quality Street is a line of tinned and boxed toffees, chocolates and sweets, first manufactured by Mackintosh's in Halifax, West Yorkshire, England, in 1936. It was named after J. M. Barrie's play Quality Street. Since 1988 they have been produced by Nestlé. Quality Street have long been a competitor to Cadbury Roses which were launched by Cadbury in 1938.
Disruptive Pattern Camouflage Uniform (DPCU), also nicknamed Auscam, jelly bean camo, or hearts and bunnies is a five-colour military camouflage pattern used by the Australian Defence Force. Replacing the jungle greens used from WWII, it was developed and tested during the late 1970s and early 1980s. The uniform was trialled in 1987, with it being slowly introduced in late 1989, with the last production and discontinuation of the jungle greens being in late 1990. Jungle greens were last issued in late 1991 for Australian Regular Army, and late 1994 for Australian Army Reserve.
The following is a partial timeline of Crayola's history. It covers the Crayola brand of marking utensils, as well as the history of Binney & Smith, the company that created the brand and is currently a subsidiary of Hallmark Cards known as Crayola LLC.
Varieties of the color red may differ in hue, chroma or lightness, or in two or three of these qualities. Variations in value are also called tints and shades, a tint being a red or other hue mixed with white, a shade being mixed with black. A large selection of these various colors is shown below.
Academic dress at the University of Edinburgh is compulsory at official ceremonial occasions, such as graduation and the installations of Rector and Chancellor, and otherwise optional, usually only worn for events.
Troops began wearing berets as a part of the headgear of military uniforms in some European countries during the 19th century; since the mid-20th century, they have become a component of the uniforms of many armed forces throughout the world. Military berets are usually pushed to the right to free the shoulder that bears the rifle on most soldiers, but the armies of some countries, mostly within Europe, South America, and Asia, have influenced the push to the left.
Colours of the Syrian hamster can be described in three ways: as "self", "agouti" or "combinations". Self colours are a consistent coat colour with the same colour topcoat and undercoat. Agouti hamsters have a different, lighter undercoat and markings around the eyes. Combinations are produced when two self or agouti colours are present.
Shades of Grey: The Road to High Saffron is a dystopian novel, the first in the Shades of Grey series by novelist Jasper Fforde. The story takes place in Chromatacia, an alternative version of the United Kingdom wherein social class is determined by one's ability to perceive colour.
Violet is a color term derived from the flower of the same name. There are numerous variations of the color violet, a sampling of which are shown below.
There are numerous variations of the color purple, a sampling of which are shown below.
Since the introduction of Crayola drawing crayons by Binney & Smith in 1903, more than two hundred distinctive colors have been produced in a wide variety of assortments. Crayola became such a hit because the company figured out a way to inexpensively combine paraffin wax with safe pigments. The line has undergone several major revisions in its history, notably in 1935, 1949, 1958, and 1990. Numerous specialty crayons have also been produced, complementing the basic Crayola assortment.
The colour blue has been important in culture, politics, art and fashion since ancient times. Blue was used in ancient Egypt for jewellery and ornament. In the Renaissance, blue pigments were prized for paintings and fine blue and white porcelain. in the Middle Ages, deep rich blues made with cobalt were used in stained glass windows. In the 19th century, the colour was often used for military uniforms and fashion.
References
- 1 2 3 4 "The CANADIAN DESIGN RESOURCE - Laurentien Pencil Crayons". 2020-09-13. Archived from the original on 13 September 2020. Retrieved 2021-04-08.
- ↑ Laurentien website [ dead link ]