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  2. Cobalt blue - Wikipedia

    en.wikipedia.org/wiki/Cobalt_blue

    Cobalt blue is a blue pigment made by sintering cobalt(II) oxide with aluminium(III) oxide (alumina) at 1200 °C. Chemically, cobalt blue pigment is cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAl 2 O 4. Cobalt blue is lighter and less intense than the (iron-cyanide based) pigment Prussian blue.

  3. List of RAL colours - Wikipedia

    en.wikipedia.org/wiki/List_of_RAL_colours

    Green blue: RAL 5002: Ultramarine blue: RAL 5003: Sapphire blue: RAL 5004: Black blue: RAL 5005: Signal blue: RAL 5007: Brilliant blue: RAL 5008: Grey blue: RAL 5009: Azure blue: RAL 5010: Gentian blue: U8 line of the Berlin U-Bahn: RAL 5011: Steel blue: RAL 5012: Light blue: U7 line of the Berlin U-Bahn: RAL 5013: Cobalt blue: Deutsche ...

  4. List of inorganic pigments - Wikipedia

    en.wikipedia.org/wiki/List_of_inorganic_pigments

    Persian blue: made by grinding up the mineral Lapis lazuli. The most important mineral component of lapis lazuli is lazurite (25% to 40%), a feldspathoid silicate mineral with the formula (Na,Ca) 8 (AlSiO 4) 6 (S,SO 4,Cl) 1–2. Cobalt pigments. Cobalt blue (PB28): cobalt(II) aluminate. Cerulean blue (PB35): cobalt(II) stannate. Cerium uranium ...

  5. The 7 Best Colors to Pair with Cobalt Blue, According to ...

    www.aol.com/lifestyle/7-best-colors-pair-cobalt...

    Here, the best colors to pair with cobalt blue. From neutrals to metallics, these expert-approved hues are perfect matches for our 2025 Color of the Year. Here, the best colors to pair with cobalt ...

  6. Why Cobalt Blue Is One of the Royals' Favorite Colors to Wear

    www.aol.com/why-cobalt-blue-one-royals-130000304...

    Cosmic Cobalt may be our 2025 Color of the Year, but this rich blue hue has long been a color of significance for royalty and ancient cultures, dating as far back as the 6th and 7th centuries B.C.

  7. Wratten number - Wikipedia

    en.wikipedia.org/wiki/Wratten_number

    Minus-blue1 + 1 / 3 ⁠ Minus-blue filter; complements #32 minus-green and #44A minus-red. Used with Ektachrome or Aerochrome Infrared films to obtain false-color results. Used in ophthalmology and optometry in conjunction with a slit-lamp and a cobalt blue light to improve contrast when assessing the health of the cornea and the fit of ...

  8. The 10 Best Cobalt Paint Colors, According to Designers

    www.aol.com/lifestyle/10-best-cobalt-paint...

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  9. Color chart - Wikipedia

    en.wikipedia.org/wiki/Color_chart

    A color chart or color reference card is a flat, physical object that has many different color samples present. They can be available as a single-page chart, or in the form of swatchbooks or color-matching fans. Typically there are two different types of color charts: Color reference charts are intended

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