Salt Lake from its inception, and Sporting Kansas City on its home uniforms since 2008. Vexillology Several countries including the Netherlands and Romania, and a U.S. state – Nevada – have cobalt blue as one of three shades of their flags. Video games Sega's official logo color is cobalt blue. Sonic the Hedgehog, Sega's current mascot, was colored to match. Toxicity Cobalt blue is toxic when ingested or inhaled. Its use requires appropriate precautions to avoid internal contamination and to prevent cobalt poisoning. Natural occurrence A single record of the compound concerns inclusions in sapphires from a single site. See also RAL 5013 Cobalt blue Lists of colors List of inorganic pigments Cobalt glass Cobalt phosphate Blue pigments References Further reading Roy, A. "Cobalt blue", in Artists' Pigments, Berrie, B. H., Ed., National Gallery of Art, Washington, D.C., 2007 Wood, J.R. and Hsu Yi-Ting, 2019, An Archaeometallurgical Explanation for the Disappearance of Egyptian and Near Eastern Cobalt-Blue Glass at the end of the Late Bronze Age, Internet Archaeology 52, Internet Archaeology External links Cobalt blue ColourLex An Archaeometallurgical Explanation for the Disappearance of Egyptian and Near Eastern Cobalt-Blue Glass at the end of the Late Bronze Age Internet Archaeology Cobalt compounds French inventions Inorganic pigments Shades of blue Glass dyes