Yes, but they're all Spanish. The psychological makeup of a light Spaniard and a dark Spaniard is not going to be terribly different. Especially if we're talking about two individuals that come from the same region of the country.
And the genetic expression of physical traits does not always correspond to the expression of psychological traits. Let's say for example a black man and a white woman have two children. One child may look very black but behave very "white". The other may look whiter but behave more "black".
What I'm trying to say is that the pool of psychological traits commonly shared by blacks to a large extent clashes with the pool of traits shared by whites. Even if a minority of black individuals can function well in the broader American white society. This is inevitable in any racially mixed society.