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  2. Lunar eclipse - Wikipedia

    en.wikipedia.org/wiki/Lunar_eclipse

    The meaning usually relates to the reddish color a totally eclipsed Moon takes on to observers on Earth. [25] As sunlight penetrates the atmosphere of Earth , the gaseous layer filters and refracts the rays in such a way that the green to violet wavelengths on the visible spectrum scatter more strongly than the red, thus giving the Moon a ...

  3. Puce - Wikipedia

    en.wikipedia.org/wiki/Puce

    Puce is a brownish purple color. The term comes from the French couleur puce, literally meaning "flea color". [1]Puce became popular in the late 18th century in France. It appeared in clothing at the court of Louis XVI, and was said to be a favorite color of Marie Antoinette, though there are no portraits of her wearing it.

  4. Color wheel - Wikipedia

    en.wikipedia.org/wiki/Color_wheel

    Gradient RGB/CMY color wheel Seven-color and twelve-color color circles from 1708, attributed to Claude Boutet Wilhelm von Bezold's 1874 Farbentafel. A color wheel or color circle [1] is an abstract illustrative organization of color hues around a circle, which shows the relationships between primary colors, secondary colors, tertiary colors etc.

  5. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    3. Between two groups, may mean that the first one is a proper subgroup of the second one. > (greater-than sign) 1. Strict inequality between two numbers; means and is read as "greater than". 2. Commonly used for denoting any strict order. 3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1.

  6. Chart - Wikipedia

    en.wikipedia.org/wiki/Chart

    A chart can represent tabular numeric data, functions or some kinds of quality structure and provides different info. The term "chart" as a graphical representation of data has multiple meanings: A data chart is a type of diagram or graph, that organizes and represents a set of numerical or qualitative data.

  7. Secondary color - Wikipedia

    en.wikipedia.org/wiki/Secondary_color

    A secondary color is a color made by mixing two primary colors of a given color model in even proportions. Combining two secondary colors in the same manner produces a tertiary color. Secondary colors are special in traditional color theory, but have no special meaning in color science.

  8. Tint, shade and tone - Wikipedia

    en.wikipedia.org/wiki/Tint,_shade_and_tone

    In color theory, a tint is a mixture of a color with white, which increases lightness, while a shade is a mixture with black, which increases darkness. Both processes affect the resulting color mixture's relative saturation. A tone is produced either by mixing a color with gray, or by both tinting and shading. [1]

  9. Parma violet - Wikipedia

    en.wikipedia.org/wiki/Parma_violet

    Parma violet is a deepish shade of violet descriptive of these flowers. The delicate purple flowers of the parma violet plant also give their name to a delicate, violet-scented sweet Parma Violets, manufactured by Swizzels Matlow.