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  2. Iris (color) - Wikipedia

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

    Iris (color) The iris genus contains 260–300 species of flower, many of them of blue and purple shades. Iris is an ambiguous color term, usually referring to shades ranging from blue-violet to violet. However, in certain applications, it has been applied to an even wider array of colors, including pale blue, mauve, pink, and even yellow (the ...

  3. Amethyst - Wikipedia

    en.wikipedia.org/wiki/Amethyst

    Amethyst is a purple variety of quartz (SiO 2) and owes its violet color to irradiation, impurities of iron (Fe 3+) and in some cases other transition metals, and the presence of other trace elements, which result in complex crystal lattice substitutions. The irradiation causes the iron Fe 3+

  4. 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 ...

  5. List of flags containing the colour purple - Wikipedia

    en.wikipedia.org/wiki/List_of_flags_containing...

    List of flags containing the colour purple. Purple is one of the least used colors in vexillology and heraldry. Currently, the color appears in only three national flags: that of Dominica, Spain, and Nicaragua, and one co-official national flag, the Wiphala (co-official national flag of Bolivia) [original research?].

  6. Viola sororia - Wikipedia

    en.wikipedia.org/wiki/Viola_sororia

    Common Blue Violet ( Viola sororia) color variant. Viola sororia is a short-stemmed, herbaceous perennial plant that grows in well-drained and shady habitats. [5] This 15–25 centimeters (6–10 in) wide violet has glossy, heart-shaped leaves and are topped with purple flowers with white throats. The lower three petals are hairy and the stem ...

  7. 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.

  8. 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.

  9. Flame test - Wikipedia

    en.wikipedia.org/wiki/Flame_test

    A flame test is relatively quick test for the presence of some elements in a sample. The technique is archaic and of questionable reliability, but once was a component of qualitative inorganic analysis. The phenomenon is related to pyrotechnics and atomic emission spectroscopy. [1] The color of the flames is understood through the principles of ...