No, Judge Jones, That's Not What It Means

There's plenty of real racism around without starting to make stuff up. Not every expression with the word "black" in it is racist. From the Dallas City Hall Blog:

Commissioner Kenneth Mayfield, who is white, said it seemed that
central collections "has become a black hole" because paperwork reportedly has
become lost in the office.

Commissioner John Wiley Price, who is black, interrupted him with a
loud "Excuse me!" He then corrected his colleague, saying the office has become
a "white hole."

That prompted Judge Thomas Jones, who is black, to demand an
apology from Mayfield for his racially insensitive analogy.