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  2. List of colors by shade - Wikipedia

    en.wikipedia.org/wiki/List_of_colors_by_shade

    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.

  3. Biuret test - Wikipedia

    en.wikipedia.org/wiki/Biuret_test

    Biuret test. In chemistry, the Biuret test (IPA: / ˌbaɪjəˈrɛt /, / ˈbaɪjəˌrɛt / [1] ), also known as Piotrowski's test, is a chemical test used for detecting the presence of at least two peptide bonds in a molecule. In the presence of peptides, a copper (II) ion forms mauve -colored coordination complexes in an alkaline solution.

  4. Viola cucullata - Wikipedia

    en.wikipedia.org/wiki/Viola_cucullata

    Binomial name. Viola cucullata. Aiton. Viola cucullata, the hooded blue violet, marsh blue violet or purple violet, is a species of the genus Viola native to eastern North America, from Newfoundland west to Ontario and Minnesota, and south to Georgia. [1] It is a recipient of the Royal Horticultural Society 's Award of Garden Merit.

  5. Purple urine bag syndrome - Wikipedia

    en.wikipedia.org/wiki/Purple_urine_bag_syndrome

    Purple urine bag syndrome ( PUBS) is a medical syndrome where purple discoloration of urine occurs in people with urinary catheters and co-existent urinary tract infection. Bacteria in the urine produce the enzyme indoxyl sulfatase. This converts indoxyl sulfate in the urine into the red and blue colored compounds indirubin and indigo. [1]

  6. Periwinkle (color) - Wikipedia

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

    A periwinkle flower. Periwinkle is a color in the blue and violet family. Its name is derived from the lesser periwinkle or myrtle herb ( Vinca minor) which bears flowers of the same color. The color periwinkle is also called lavender blue and light blue violet. [2] The color periwinkle may be considered a pale tint of purple-blue in the ...

  7. Azo violet - Wikipedia

    en.wikipedia.org/wiki/Azo_violet

    Azo violet (Magneson I; p-nitrobenzeneazoresorcinol) is an azo compound with the chemical formula C 12 H 9 N 3 O 4. It is used commercially as a violet dye and experimentally as a pH indicator , appearing yellow below pH 11, and violet above pH 13. [2]

  8. Color wheel - Wikipedia

    en.wikipedia.org/wiki/Color_wheel

    The corresponding secondary colors are green, orange, and violet or purple. The tertiary colors are green-yellow, yellow-orange, orange-red, red-violet/purple, purple/violet-blue and blue-green. Non-digital visual artists typically use red, yellow, and blue primaries (RYB color model) arranged at three equally spaced points around their color ...

  9. Lists of colors - Wikipedia

    en.wikipedia.org/wiki/Lists_of_colors

    These are the lists of colors ; List of colors: A–F. List of colors: G–M. List of colors: N–Z. List of colors (alphabetical) List of colors by shade. List of color palettes. List of Crayola crayon colors. List of RAL colours.