Reparations are unconstitutional in today's Supreme Court: a legal opnion.

Leading Democrats are now endorsing reparations for black Americans. That could cost taxpayers trillions of dollars and harm the economy.
Most forms of reparations would violate the Constitution as currently interpreted by the Supreme Court. It interprets the Constitution as usually forbidding racial handouts, even for historically disadvantaged groups. But Supreme Court rulings against racial entitlements are mostly 5-to-4 decisions with liberal justices in dissent. So the next Democratic administration could override those rulings just by appointing left-leaning justices to replace conservative justices who die or retire.
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 Source:  https://fee.org/articles/reparations-would-cost-trillions-and-are-unconstitutional/