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Vermilion is not one specific hue; mercuric sulfides make a range of warm hues, from bright orange-red to a duller reddish-purple that resembles fresh liver. Differences in hue are caused by the size of the ground particles of pigment. Larger crystals produce duller and less orange hues.
Lycopene is a classic example of a compound with extensive conjugation (11 conjugated double bonds), giving rise to an intense red color (lycopene is responsible for the color of tomatoes). Charge-transfer complexes tend to have very intense colors for different reasons.
The red, orange, and yellow wavelengths of light are absorbed so the remaining light seen is composed of green, cyan, and blue wavelengths. This is the main reason the ocean's color is cyan. The relative contribution of reflected skylight and the light scattered back from the depths is strongly dependent on observation angle.
Vermilion is a very ancient red-orange pigment, made by pulverizing the mineral cinnabar.Its defect is that it is liable to darken with age, and sometimes develops a purple-red surface sheen, as seen in some paintings by Paolo Uccello, including the bridles of the horses depicts in "The Battle of San Romano" .
Crimson is a rich, deep red color, inclining to purple. [2] It originally meant the color of the kermes dye produced from a scale insect, Kermes vermilio, but the name is now sometimes also used as a generic term for slightly bluish-red colors that are between red and rose. It is the national color of Nepal.
The orange color is often added artificially—light yellow-orange is the natural color created by the actual chromoplasts. [7] Valencia oranges Citris sinensis L are a cultivated orange grown extensively in the state of Florida. In the winter, Valencia oranges reach their optimum orange-rind color while reverting to a green color in the spring ...
If you looked above at the night sky on Thursday in Central or South Texas, you may have noticed that the moon had an orange-reddish hue. No, it wasn't a lunar eclipse — but your eyes didn't ...
However, it is widely considered hard to standardize, and the same vary name could be applied to various tones; russet often has no more specific meaning than ruddy or reddish. [1] The name of this color derives from russet, a coarse cloth made of wool and dyed with woad and madder to give it a subdued grey or reddish-brown shade. By the ...