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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, "dark blue ...
Deep sky blue is an azure-cyan colour associated with deep shade of sky blue. Deep sky blue is a web colour. This is the colour on the colour wheel (RGB/HSV colour wheel) halfway between azure and cyan. [34] The colour name deep sky blue came into use with the formulization of the X11 colour names over 1985–1989.
The web color light blue is part of the X11 color system, with a hue code of 194. This color is closer to cyan than to blue. Variations of this color are known as sky blue, baby blue, or angel blue. The first recorded use of "light blue" as a color term in English is in the year 1915.
Bortle scale. The Bortle dark-sky scale (usually referred to as simply the Bortle scale) is a nine-level numeric scale that measures the night sky 's brightness of a particular location. It quantifies the astronomical observability of celestial objects and the interference caused by light pollution.
The star clouds of the Milky Way hang over the Cape Lookout Lighthouse and its keepers' quarters in this Oct. 2, 2021, photo. The Cape Lookout area is a designated dark sky site where light ...
Capri or deep sky blue is a deep shade of sky blue which is between cyan and azure on the color wheel. The color Capri in general is named for the color of the Mediterranean Sea around the island of Capri off Italy, the site of several villas belonging to the Roman Emperor Tiberius, including his Imperial residence in his later years, the Villa Jovis.
Diffuse sky radiation. In Earth's atmosphere, the dominant scattering efficiency of blue light is compared to red or green light. Scattering and absorption are major causes of the attenuation of sunlight radiation by the atmosphere. During broad daylight, the sky is blue due to Rayleigh scattering, while around sunrise or sunset, and especially ...
List of colors: A–F. Colors are an important part of visual arts, fashion, interior design, and many other fields and disciplines. The following is a list of colors. A number of the color swatches below are taken from domain-specific naming schemes such as X11 or HTML4. RGB values are given for each swatch because such standards are defined ...