Maroon lake

from The Collaborative International Dictionary of English v.0.48

Maroon \Ma*roon"\ (m[.a]*r[=oo]n"), a. [F. marron
   chestnut-colored, fr. marron a large French chestnut, It.
   marrone; cf. LGr. ma`raon. Cf. {Marron}.]
   Having the color called maroon. See 4th {Maroon}.
   [1913 Webster]

   {Maroon lake}, lake prepared from madder, and distinguished
      for its transparency and the depth and durability of its
      color.
      [1913 Webster]