Classification along racial lines, when involving state action, is unconstitutional. Such classification may violate the due process or equal protection clause of the fourteenth amendment or the fifteenth amendment, and it has been held invalid in the fields of education, transportation, voting, recreational facilities, ownership and use of real property, and jury selection.
Joseph A. Milchen,
Unconstitutional Racial Classification and De Facto Segregation,
Mich. L. Rev.
Available at: https://repository.law.umich.edu/mlr/vol63/iss5/5