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Airglow over Auvergne, France Yellow, green and red bands of airglow along Earth's limb as seen from space. Airglow (also called nightglow ) is a faint emission of light by a planetary atmosphere . In the case of Earth's atmosphere , this optical phenomenon causes the night sky never to be completely dark, even after the effects of starlight ...
Pakistan green is a shade of dark green, used in web development and graphic design. It originates with the field of green used on the flag of Pakistan, only stipulated as "dark green" in the national flag code. It is almost identical to the HTML/X11 dark green in sRGB and HSV values.
All-sky maps of skyglow brightness are produced with professional-grade imaging cameras with CCD detectors and using stars as calibration sources. [10] [11] Amateur astronomers have used the Bortle Dark-Sky Scale to approximately quantify skyglow ever since it was published in Sky & Telescope magazine in February 2001. [12]
Magenta is variously defined as a purplish-red, reddish-purple, or a mauvish–crimson color. On color wheels of the RGB and CMY color models, it is located midway between red and blue, opposite green. Complements of magenta are evoked by light having a spectrum dominated by energy with a wavelength of roughly 500–530 nm.
Acid green 50 Food green 4 44090 triarylmethane 3087-16-9: Guinea green B Guinea green Acid green 3 Food green 1 42085 triarylmethane 4680-78-8: Hematoxylin/Hematein: Natural black 1 75290 natural 517-28-2: Hofmann's Violet Dahlia Primula 42530 triarylmethane 8004-86-2: Hydroxynaphthol blue: azo 63451-35-4: Indigo: Indigo blue Vat blue 1 73000 ...
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It is a deep, dark green, which may vary from intense to very dark, almost black. [45] The first recorded use of Brunswick green as a color name in English was in 1764. [46] Another name for this color is English green. The first use of English green as a synonym for Brunswick green was in 1923. [47]
Viridian is a blue-green pigment, a hydrated chromium(III) oxide, of medium saturation and relatively dark in value. It is composed of a majority of green, followed by blue. The first recorded use of viridian as a color name in English was in the 1860s. [2] Viridian takes its name from the Latin viridis, meaning "green". [3]