General Darkness:
* Black
* Gloomy
* Shady
* Dim
* Dusky
* Obscure
* Shadowy
* Pitch-black
* Stygian (very dark)
Figurative Meanings:
* Depressing
* Grim
* Melancholy
* Sinister
* Ominous
* Evil (associated with darkness)
* Secret (hidden from the light)
* Unknown
* Mysterious
* Uncertain
* Unclear
Color-Related:
* Jet black
* Ebony
* Midnight blue
* Charcoal
For specific contexts, choose the most appropriate synonym. For example, if you're describing a room, "dim" or "gloomy" might be suitable, whereas if you're talking about a person's mood, "depressing" or "melancholy" might be more fitting.