Eschel blue

English

Noun

Eschel blue (plural not attested)

  1. A specific shade of blue, a trademarked color name.
    • 1874, Jean RenĂ© Denis Riffault des HĂȘtres, Armand Denis Vergnaud, G. Alvar Toussaint, A Practical Treatise on the Manufacture of Colors for Painting, Comprising the Origin, Definition, and Classification of Colors; the Treatment of the Raw Materials Etc, page 352:
      Independently of the ordinary smalt, there is another darker blue, with a very fine grain, and which is generally called Eschel blue or Laundry blue.