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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.
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.
Plum is a purple color with a brownish-gray tinge, like that shown on the right, or a reddish purple, which is a close representation of the average color of the plum fruit. As a quaternary color on the RYB color wheel, plum is an equal mix of the tertiary colors russet and slate. [2] [3] The first recorded use of plum as a color name in ...
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.
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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 ...
Purple cauliflower contains anthocyanins. Anthocyanins (from Ancient Greek ἄνθος (ánthos) 'flower' and κυάνεος / κυανοῦς (kuáneos/kuanoûs) 'dark blue'), also called anthocyans, are water-soluble vacuolar pigments that, depending on their pH, may appear red, purple, blue, or black.
Isaac Newton's Opticks distinguished between pure orange light and mixtures of red and yellow light by noting that mixtures could be separated using a prism. [26] In the traditional colour wheel used by painters, orange is the range of colours between red and yellow, and painters can obtain orange simply by mixing red and yellow in various ...