Of the colour of ink, especially black ink; dark.(adjective)
Spattered or stained with ink(adjective)
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Use "inky" in a sentence
"His own bulging flesh was covered in inky-blue tattoos and he clearly had no idea she was an Olympic champion."
"The room was in inky darkness, save where a small window admitted a faint gray light that indicated the outer world."
"The wide river, flowing rapidly between its rugged banks, rolled in inky blackness beneath the overshadowing crags; while the waves in mid-channel flashed along in dazzling light, rendered more intense by the surrounding darkness."