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Fabrics dyed in the current era from different species of sea snail. The colours in this photograph may not represent them precisely. Tyrian purple (Ancient Greek: πορφύρα porphúra; Latin: purpura), also known as royal purple, imperial purple, or imperial dye, is a reddish-purple natural dye.
Color theory, or more specifically traditional color theory, is the historical body of knowledge describing the behavior of colors, namely in color mixing, color contrast effects, color harmony, color schemes and color symbolism. [1] Modern color theory is generally referred to as Color science.
Pigment color differs from structural color in that it is the same for all viewing angles, whereas structural color is the result of selective reflection or iridescence, usually because of multilayer structures. For example, butterfly wings typically contain structural color, although many butterflies have cells that contain pigment as well. [3]
The purplish-black color of solid potassium permanganate, and the intensely pink to purple color of its solutions, is caused by its permanganate anion, which gets its color from a strong charge-transfer absorption band caused by excitation of electrons from oxo ligand orbitals to empty orbitals of the manganese(VII) center.
The cochineal (/ ˌ k ɒ tʃ ɪ ˈ n iː l, ˈ k ɒ tʃ ɪ n iː l / KOTCH-ih-NEEL, -neel, US also / ˌ k oʊ tʃ ɪ ˈ n iː l, ˈ k oʊ tʃ ɪ n iː l / KOH-chih-; [1] Dactylopius coccus) is a scale insect in the suborder Sternorrhyncha, from which the natural dye carmine is derived.
The International Union of Pure and Applied Chemistry (IUPAC) publishes many books which contain its complete list of definitions.The definitions are divided initially into seven IUPAC Colour Books: Gold, Green, Blue, Purple, Orange, White, and Red. [1]
Throughout history, people have dyed their textiles using common, locally available materials, but scarce dyestuffs that produced brilliant and permanent colors such as the natural invertebrate dyes Tyrian purple and crimson kermes became highly prized luxury items in the ancient and medieval world.
The wingspan on the adult butterfly ranges from 1.25 to 1.5 inches. Despite its common name "great purple hairstreak", this butterfly does not sport any purple coloration. Instead, the upper-side of the wings are iridescent blue at the center, with a black border, and males typically have both a more extensive and brighter blue wing coloration when compared to their female counterpart