All humans should be treated the same no matter the skin color.
Neither slavery nor involuntary servitude, except as a punishment for crime where of the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction.Congress shall have power to enforce this article by appropriate legislation.
The 13th Amendment
The Fourteenth Amendment addresses many aspects of citizenship and the rights of citizens.All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the state wherein they reside.
No state shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States .
The 14th Amendment
The 15th Amendment to the Constitution granted African American men the right to vote by declaring that the "right of citizens of the United States to vote shall not be denied or abridged by the United States or by any state on account of race, color, or previous condition of servitude."
It took the passage of the Voting Rights Act of 1965 before the majority of African Americans in the south were registered to vote.