Fuliginous:
Pertaining to or resembling soot in such features as colour, texture or taste; sooty, dusky. [from 16th c.] [Wiktionary]
Noted in “Tucker Carlson whitewashes the racism of his show and his former top writer,” Erik Wemple, WaPo:
In a network of ideologues, Carlson occupies a particularly fuliginous fringe. Even the network’s leaders in Saturday’s note to colleagues characterized Neff’s postings as “deeply offensive racist, sexist and homophobic.” On the other hand, Carlson apparently couldn’t even bring himself to echo those same denunciations. That’s because Carlson has spent his entire career as a Fox News prime-time host — nearly four years — skewering those who call out President Trump for being, well, racist, sexist and other offensive things. Those spotters of hatred are a prime target for Carlson, a lure for viewers. There was no way that he was going to use his own show to call out racism by its name.