They knew him directly by his moustaches, which were trimmed to the resemblance of eels, and by his sloeberry-coloured nose.    From Wordnik.com.  [Selected Polish Tales] Reference

Tamada regarded him with eyes that did not lack a certain luster, as a sloeberry might hold it, but which, beneath their hooded lids, revealed neither interest, nor curiosity, nor friendliness.    From Wordnik.com.  [A Man to His Mate] Reference