Ebon and Stygian

Ebon adjective - Of a very dark black.

Stygian and ebon are semantically related in black topic. In some cases you can use "Stygian" instead an adjective "Ebon", when it comes to topics like dark.

Stygian adjective - Being without light or without much light.

Ebon and stygian are semantically related in black topic. Sometimes you can use "Ebon" instead an adjective "Stygian", if it concerns topics such as dark.