Cobalt ultramarine

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A synthetic cobalt blue pigment that is the same shade as ultramarine blue (Mayer 1969).

Synonyms and Related Terms

ultramarino de cobalto (Esp., Port.); cobalto oltremare (It.); Gahn's blue


  • Skin contact may cause allergies, especially on elbows, neck and ankles.
  • Chronic inhalation may cause asthma.
  • Ingestion may cause vomiting, diarrhea and the sensation of hotness.

Resources and Citations

  • Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)