Blackly

Here and there, sun glanced off water, and slick surfaces shone blackly orange in the morning light.

Source: wiktionary

Maccario, it was evident, did not care to take the risk of blundering upon a picket, and a man led them by twisting paths until at last the hacienda rose blackly before them.

Source: wiktionary

One of the most interesting — and confusing — vampire stories to deal with questions of morality in the postmodern context is the blackly comic film Vampire's Kiss (dir. Robert Bierman, 1988), which tells of a despicable yuppie named Peter Low — played in completely over-the-top fashion by Nicholas Cage — and his encounter at a singles bar with the vampire Rachel.

Source: wiktionary

He knew himself for a lost soul, and all that he loved in the world was out in the tides. There, at any rate, he could go, too, and give back that gift of life he had so blackly misused.

Source: wiktionary