In what countries do Blacks and Mulattoes in the same social class?

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Brazil basically has a functioning caste system.....or at least the remnants of their history with said caste system lingers today. It was similar to apartheid where those of mixed heritage were accepted as superior to Brazilians of more visible African descent.

Yeah, from what I understand the Pardos in Brazil tend to marry and associate with other Pardos not Blacks.