The name of the Devil's son was Cain. Cain, unlike his brother Abel, was of dark skin, representing evil, which is black.
Abel was Adam and Eve's son but Cain was Lucifer and Eve's son. Cain killed Abel, becoming the first murderer on Earth. He was full of jealousy and envy. Lucifer is another name for "Devil" or "Satan." According to Abrahamic religions, Adam and Eve were the first woman and man on Earth. Lucifer deceived Eve into having a sexual relationship with him as a serpent in human form. That is how she conceived Cain together with Abel. Lucifer, whose name means "morning star" or "shining one," is a fallen angel.