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  2. Purple - Wikipedia

    en.wikipedia.org/wiki/Purple

    The standard HTML color purple is created by red and blue light of equal intensity, at a brightness that is halfway between full power and darkness. In color printing, purple is sometimes represented by the color magenta, or sometimes by mixing magenta with red or blue. It can also be created by mixing just red and blue alone, but in that case ...

  3. Color blindness - Wikipedia

    en.wikipedia.org/wiki/Color_blindness

    Both forms are almost always symptomatic of congenital red–green color blindness, so affects males disproportionately more than females. [37] This form of color blindness is sometimes referred to as daltonism after John Dalton, who had red–green dichromacy. In some languages, daltonism is still used to describe red–green color blindness.

  4. Tyrian purple - Wikipedia

    en.wikipedia.org/wiki/Tyrian_purple

    Variations in colours of "Tyrian purple" from different snails are related to the presence of indigo dye (blue), 6-bromoindigo (purple), and the red 6,6'-dibromoindigo. Additional changes in colour can be induced by debromination from light exposure (as is the case for Tekhelet ) or by heat processing. [ 36 ]

  5. Visible spectrum - Wikipedia

    en.wikipedia.org/wiki/Visible_spectrum

    The spectral colors from red to violet are divided by the notes of the musical scale, starting at D. The circle completes a full octave, from D to D. Newton's circle places red, at one end of the spectrum, next to violet, at the other. This reflects the fact that non-spectral purple colors are observed when red and violet light are mixed.

  6. Cochineal - Wikipedia

    en.wikipedia.org/wiki/Cochineal

    In 1454, Pope Paul II officially changed the color of the robes worn by Catholic cardinals from "Cardinal's purple" to vibrant red. By 1558, their red robes would have been created with American cochineal. [24]: 45 By the 1600s, cochineal also gave the English "Redcoats" their distinctive officers' uniforms.

  7. Burgundy (color) - Wikipedia

    en.wikipedia.org/wiki/Burgundy_(color)

    Burgundy is a purplish red. [4] [5] European Union passports are usually burgundy in color. The color burgundy takes its name from the Burgundy wine in France. When referring to the color, "burgundy" is not usually capitalized. [6] The color burgundy is similar to Bordeaux (Web color code #4C1C24), Merlot (#73343A), Berry (#A01641), and ...

  8. Secondary color - Wikipedia

    en.wikipedia.org/wiki/Secondary_color

    A RYB color wheel with tertiary colors described under the modern definition. RYB is a subtractive mixing color model, used to estimate the mixing of pigments (e.g. paint) in traditional color theory, with primary colors red, yellow, and blue. The secondary colors are green, purple, and orange as demonstrated here:

  9. Red states and blue states - Wikipedia

    en.wikipedia.org/wiki/Red_states_and_blue_states

    By 1996, color schemes were relatively mixed, as CNN, CBS, ABC, and The New York Times referred to Democratic states with the color blue and Republican ones as red, while Time and The Washington Post used the opposite scheme. [17] [18] [19] NBC used the color blue for the incumbent party, which is why blue represented the Democrats in 2000.

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