Not in the racial sense, but culturally, like a SSA man is culturally white if he practices Euro culture. Australoids doesn't look like West Africans, so no.
Black to me is more of an identity than a phenotype.If a pred SSA doesnt want to idenitify with being black, then I wouldnt consider them black but Other. But if a Biracial wants to.idenitfy with being Black, then.Ill consider them to be Black. Some of my relatives dont look pred SSA, but they will be flipping angry if you tell them they arent Black.
Your definition is narrow.