黑 refers to the color black. It is often used to describe something that is dark or lacks light.
白 (bái): 白 means white, which is the opposite of black.
暗 (àn): 暗 means dark, and it can be used to describe places or situations with low lighting.
乌黑 (wū hēi): 乌黑 describes something that is pitch black, like the feathers of a raven.