An Etymological Dictionary of Astronomy and Astrophysics

A dusky color between red and black.

Etymology (EN): M.E. broun, from O.E. brun “dark,” cf. Du. bruin, Ger. braun; PIE base *bher- “shining, brown,”
related to *bheros “dark animal” (cf. beaver, bear).

Etymology (PE): Qahvei-yi, color of qahvé “coffee.”