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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. Blue pigments - Wikipedia

   en.wikipedia.org/wiki/Blue_pigments

   Cobalt blue pigment. Blue pigments are natural or synthetic materials, usually made from minerals and insoluble with water, used to make the blue colors in painting and other arts. The raw material of the earliest blue pigment was lapis lazuli from mines in Afghanistan, that was refined into the pigment ultramarine.

4. List of inorganic pigments - Wikipedia

   en.wikipedia.org/wiki/List_of_inorganic_pigments

   Cobalt pigments. Cobalt blue (PB28): cobalt(II) aluminate. Cerulean blue (PB35): cobalt(II) stannate. Cerium uranium blue; Copper pigments. Egyptian blue: a synthetic pigment of calcium copper silicate (CaCuSi 4 O 10). Thought to be the first synthetically produced pigment. Han blue: BaCuSi 4 O 10. Azurite: cupric carbonate hydroxide (Cu 3 (CO ...

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

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

   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.

6. Why 'Cosmic Cobalt' Is Our Color of the Year for 2025

   www.aol.com/lifestyle/why-cosmic-cobalt-color...

   Eventually, a less costly pigment was developed from cobalt ores, giving the color its present-day name. Cosmic Cobalt has been a favorite color for artists of every era. Getty Images/Wikimedia ...

7. The Most Beautiful Cobalt Blue Landmarks, According to ... - AOL

   www.aol.com/most-beautiful-cobalt-blue-landmarks...

   Like a true-blue travel companion, Cosmic Cobalt remains a bold-yet-calming presence on almost any journey you can imagine. This universal shade is not only the color of the twinkling night sky ...