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In nature, many blue phenomena arise from structural colouration, the result of interference between reflections from two or more surfaces of thin films, combined with refraction as light enters and exits such films. The geometry then determines that at certain angles, the light reflected from both surfaces interferes constructively, while at ...
Blue pigments are natural or synthetic materials, usually made from minerals and insoluble with water, used to make the blue colors in painting and other arts. The raw material of the earliest blue pigment was lapis lazuli from mines in Afghanistan, that was refined into the pigment ultramarine. Since the late 18th and 19th century, blue ...
Cerulean. Cerulean ( / səˈruːliən / ), also spelled caerulean, is a variety of the hue of blue that may range from a light azure blue to a more intense sky blue, and may be mixed as well with the hue of green. The first recorded use of cerulean as a colour name in English was in 1590. [ 1] The word is derived from the Latin word caeruleus ...
The dark markings on both birds are due to the black pigment eumelanin. Biological pigments, also known simply as pigments or biochromes, [ 1] are substances produced by living organisms that have a color resulting from selective color absorption. Biological pigments include plant pigments and flower pigments.
Air force blue, also known as RAF blue, is used by the Royal Air Force, the first air force to choose an "air force blue" color by which to identify itself, in 1920. The color "air force blue" is a medium tone of azure since it has a hue code of 204 which is a hue code between 195 and 225, signifying a tone of azure.
White light is dispersed by a prism into the colors of the visible spectrum. The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light (or simply light). The optical spectrum is sometimes considered to be the same as the ...
The NCS color model is based on the three pairs of elementary colors ( white – black, green – red, and yellow – blue ), as defined by color opponency. The Natural Color System ( NCS) is a proprietary perceptual color model. It is based on the color opponency hypothesis of color vision, first proposed by German physiologist Ewald Hering. [ 1]
Blue-gray. Livid is a medium bluish - gray color. This color name comes from the Latin color term lividus meaning "'a dull leaden-blue color', and also used to describe the color of contused flesh, leading to the English expression 'black and blue'". [ 1] The first recorded use of livid as a color name in English was in 1622.