ebony vs pitch-black

ebony

• A deep, dark black colour. 

• Made of ebony wood. 

• Dark-skinned; black; especially in reference to African-Americans. 

• A black key on a piano or other keyboard instrument. 

• A tree that yields such wood. 

• A deep, dark black colour. 

• A hard, dense, deep black wood from various subtropical and tropical trees, especially of the genus Diospyros. 

pitch-black

• Very dark; without light.