All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
What you have mentioned about the children of Aadam is not mentioned in the Quran. What is mentioned in the Quran about the two children of Aadam is the following: Allaah says (which means): {And recite to them the story of Aadam’s two Sons, in truth, when they both offered a sacrifice [to Allaah], and it was accepted from one of them but was not accepted from the other. Said [the latter], ''I will surely kill you." Said [the former], "Indeed, Allaah only accepts from the righteous [who fear Him]. If you should raise your hand against me to kill me, I shall not raise my hand against you to kill you. Indeed, I fear Allaah, Lord of the worlds. Indeed, I want you to obtain [thereby] my sin and your sin so you will be among the companions of the Fire. And that is the recompense of wrongdoers. And his soul permitted to him the murder of his brother, so he killed him and became among the losers.}[Quran 5:27-30]. As regards one of them being white and the other black, this is something that is neither mentioned in the Quran nor in the Sunnah of the Prophet .
Allaah knows best.