Wiktionary
fuligin
a. 1 fuliginous; sooty or black 2 of the colour fuligin n. 1 soot, lampblack 2 a hypothetical colour darker than black
Usage examples of "fuligin".
He was happy enough to seize the opportunity to relieve himself and handed over his wide-bladed carnificial sword (which I in theory was not supposed to touch) and his fuligin cloak (which I was forbidden to wear, though I was already taller than most of the journeymen) so that from a distance it would appear that there had been no substitution.