Pauls Complexion

As Paul grew up he always knew that he was something different from the rest of his family. He never really knew what it was but always seemed to be the black sheep of the family which made him feel some type of way. He didn't really mind until as he grew older to finally see the difference between him and his family. What really makes up a family to some people? Does it always have to do with skin tone or what happens to be on the inside that counts?