And for everyone who brought up the Tamarians, no. They are not black. They have orange and red skin. If you're going to argue with me on that, you might as well argue that the male character "Billy Kwan" from the movie "The Year of Living Dangerously" is a woman because he was portrayed by an actress.
Ah, but that goes for the Ligonians too. They are aliens played by African American actors, like the Tamarians. If the Tamarians are not black, then neither are the Ligonians.
This goes back to my thread a few months ago. The Ligonians weren't alien enough to avoid the perception of racism. Put a bumpy forehead on them, and people would be more likely to see them as "alien" rather than "black."
Take the bumpy foreheads off the Tamarians, and some people would summarise Darmok
as "unintelligible black men kidnap white man and force him into a knife fight."