What was the basis of Plessys appeal?

Plessy's appeal was primarily based on the argument that the Louisiana law enforcing racial segregation on railway cars violated the Equal Protection Clause of the Fourteenth Amendment. He contended that the law discriminated against African Americans and was inherently unjust, as it enforced a system of racial inequality. Plessy also argued that the law was unconstitutional because it denied him the rights and privileges afforded to white citizens, thus challenging the legality of segregation practices.