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  2. List of reagent testing color charts - Wikipedia

    en.wikipedia.org/wiki/List_of_reagent_testing...

    It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2]

  3. Periwinkle (color) - Wikipedia

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

    Periwinkle blue is the color for esophageal and stomach cancer awareness ribbons, and for anorexia nervosa and bulimia. It is also the color for pulmonary hypertension awareness ribbons. [citation needed] Periwinkle was added to the Crayola palette in 1949. [6] In the late 1990s, the Anaheim Angels changed their uniform to include this color. [7]

  4. ISCC–NBS system - Wikipedia

    en.wikipedia.org/wiki/ISCC–NBS_system

    In 1965, the NBS published Centroid Color Charts made up of color samples demonstrating the central color in each category, as a physical representation of the system usable by the public, and also published The Universal Color Language, a more general system for color designation with various degrees of precision from completely generic (13 ...

  5. Munsell color system - Wikipedia

    en.wikipedia.org/wiki/Munsell_color_system

    In colorimetry, the Munsell color system is a color space that specifies colors based on three properties of color: hue (basic color), value , and chroma (color intensity). It was created by Albert H. Munsell in the first decade of the 20th century and adopted by the United States Department of Agriculture (USDA) as the official color system ...

  6. Ostwald color system - Wikipedia

    en.wikipedia.org/wiki/Ostwald_color_system

    The Color Harmony Manuals were published beginning in 1942, and have been out of print since 1972. [2] Ostwald's first Color Harmony Manual was a set of 12 handbooks showing complementary hues. The first edition was published in 1942. It contained 680 color chips. Each color chip was a 5/8 inch square and had a tab where the Ostwald notation ...

  7. Pavāraṇā - Wikipedia

    en.wikipedia.org/wiki/Pavāraṇā

    Pavāraṇā (Pali; Sanskrit: Pravāraṇā) is a Buddhist ceremony held on Aashvin full moon of the lunar month.This usually occurs on the full moon of the 11th month. It marks the end of the three lunar months of Vassa, sometimes called "Buddhist Lent."