There’s absolutely no evidence to support the idea that Cleopatra was black and much evidence to discount the possibility.
Although many Egyptians were black, Cleopatra was not Egyptian.
She descended from a line of Macedonian Greeks in a family so determined to avoid diluting the family blood that it practiced a severe form of incestuous interbreeding, in which brothers married sisters and fathers married daughters.
Cleopatra at 17, following the family ways, married her pesky 12-year-old brother.
He was later slaughtered as he battled her for the throne, which should not be surprising to anyone who has had an older sister.