For Venezuela the smaller map on the side includes black and brown populations together, with the aforementioned caveat of indigenous people being included in those categories.
Yeah, I suppose the map would look much different if this rule was applied to other countries.
The Black population in Venezuela is pretty low, IIRC they're mostly concentrated in the Barlovento region of Miranda, as well as a few coastal towns in Aragua.
I do have to ask why you did it for Brazil and not for Venezuela, though.
I love this following racial map of Brazil because it also shows the geographical distribution of the population: highly concentrated on the coast and near areas; in the empty north they’re mostly alongside the Amazon River... While there’s almost no one in the north or in the center of the country.