Quick One! Black Comedy

When I was much younger I thought the term "black comedy" meant a comedy mainly featuring black people. So when I checked out the movie "The War of the Roses" (it was the first I saw that was billed as a black comedy), I was waiting to see the black people...I waited till the end. While the movie was great (it still kinda holds up nicely today), I knew there must have been a typo or a miscategorization...or "black comedy" must mean something else.
Today when I think of black comedy, "The War of the Roses" is the definition in my mind:
a movie that makes you laugh at the darkest of stuff.