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Used as the co-official national flag; see Wiphala: Dominica: 3 November 1978: As purple sisserou parrot, a national symbol (see flag of Dominica) El Salvador: 27 May 1912: As part of the rainbow in the coat of arms (see flag of El Salvador) Nicaragua: 27 August 1971: As part of the rainbow in the coat of arms (see flag of Nicaragua) Spain: 5 ...
In the traditional RYB color model, the complementary color pairs are red – green, yellow – purple, and blue – orange. Opponent process theory suggests that the most contrasting color pairs are red–green and blue–yellow. The black - white color pair is common to all the above theories.
The Cambridge University official colour style guide defines Cambridge Blue as Pantone 557 C; [1] with RGB values of R 133, G 176, B 154. [2] This colour has evolved into a medium tone of spring green. Spring green colours are colours with an h code (hue code) of between 135 and 165; this colour has an h code of 140, putting it within the range ...
Tyrian purple is a pigment made from the mucus of several species of Murex snail. Production of Tyrian purple for use as a fabric dye began as early as 1200 BC by the Phoenicians, and was continued by the Greeks and Romans until 1453 AD, with the fall of Constantinople.
Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. [2] It lies between violet and cyan on the spectrum of visible light. The term blue generally describes colours perceived by humans observing light with a dominant wavelength that’s between approximately ...
Remazol Brilliant Blue R ( RBBR) is an anthraquinone dye used in textile industries. [1] It is a harmful dye and can damage aquatic life and also vegetative life if the contaminated water is used for irrigation. [2] Recent studies have suggested a biological approach to solving this problem through the use of microorganisms to degrade the dye.
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