Inky (adjective)

1. Dark or black in color, like ink.
2. Having the color or appearance of ink.

Origin:

From inky, related to ink.

Examples:

1. The inky sky was a sign of a coming storm.
2. His inky hair was slicked back.
3. The inky water of the lake was dark and mysterious.
4. The inky fingerprints were left on the document.
5. The inky trail from the squid was a sign of its presence.