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Water color can reveal physical, chemical and bacteriological conditions. In drinking water, green can indicate copper leaching from copper plumbing and can also represent algae growth. Blue can also indicate copper, or might be caused by syphoning of industrial cleaners in the tank of commodes, commonly known as backflowing.
Ocean color is the branch of ocean optics that specifically studies the color of the water and information that can be gained from looking at variations in color. The color of the ocean, while mainly blue, actually varies from blue to green or even yellow, brown or red in some cases. [1]
Haliclona caerulea takes the form of an encrusting mass of cylindrical to volcano-shaped projections between 2 and 15 cm, with oscula at the high end. The oscula are circular or oval, and between 1.3 and 5.0 mm in diameter. [2]
In the Netherlands, a project called the Citizen’s observatory for Coast and Ocean Optical Monitoring (Citclops) project has begun crowdsourcing water color measurements from citizen scientists. Citizen scientists estimate the color of the water with the Forel-Ule scale using a smartphone app called “Eye on water.” [ 4 ] [ 5 ] [ 6 ]
Hues of blue include indigo and ultramarine, closer to violet; pure blue, without any mixture of other colours; Azure, which is a lighter shade of blue, similar to the colour of the sky; Cyan, which is midway in the spectrum between blue and green, and the other blue-greens such as turquoise, teal, and aquamarine.
The word is derived from the Latin word caeruleus (Latin: [kae̯ˈru.le.us]), "dark blue, blue, or blue-green", which in turn probably derives from caerulum, diminutive of caelum, "heaven, sky". [2] "Cerulean blue" is the name of a blue-green pigment consisting of cobalt stannate (Co 2 SnO 4). The pigment was first synthesized in the late ...
An artist working on a watercolor using a round brush Love's Messenger, an 1885 watercolor and tempera by Marie Spartali Stillman. Watercolor (American English) or watercolour (Commonwealth English; see spelling differences), also aquarelle (French:; from Italian diminutive of Latin aqua 'water'), [1] is a painting method [2] in which the paints are made of pigments suspended in a water-based ...
Blue was a latecomer among colors used in art and decoration, as well as language and literature. [7] [verification needed] Reds, blacks, browns, and ochres are found in cave paintings from the Upper Paleolithic period, but not blue. Blue was also not used for dyeing fabric until long after red, ochre, pink and purple.