The character on the left has black skin, while the character in the middle has dark skin
black skin
Skin colored black, like coal or ebony. The opposite of white skin.
For the usual brown, use dark skin, very dark skin and/or tan as appropriate.
Unlike very dark skin, black skin has no undertone, no hint of brown, yellow or red. Even the darkest of natural human skin has an undertone, even if not easily percieved at first glance or in some pictures.
See also
This tag implicates colored_skin (learn more).
