Peace be upon you,
Racism is a satanic principle that was initiated by the Father of all Racists - Satan.
(7:12) He said, "What prevented you from prostrating when I ordered you?" He said, "I am better than he; You created me from fire, and created him from mud."
(38:76) He said, "I am better than he; You created me from fire, and created him from clay."
When we are racist, we express an "I am better than he" attitude just like Satan did with Adam.
Once a person truly Submits to God, he will start looking through the eyes of his own soul rather than counting on the external, earthly and temporary forms of earth. He will then recognize that all humans are from God's breath and that we all belong to Him. Once you recognize this truth, you will transcend the concept of racism in all its forms.
The Quran shows that in God's eyes we are all peoples of different tribes, tongues, ethnic backgrounds, and so on. The best among us, according to God, is the MOST RIGHTEOUS. God doesn't say the best among us is the Arab, or the white or black guy - He says the best is the most righteous. Perhaps we, the human race, should carry this type of attitude and belief with us all the time.
(49:13) O people, we created you from the same male and female, and rendered you distinct peoples and tribes, that you may recognize one another. The best among you in the sight of GOD is the most righteous. GOD is Omniscient, Cognizant.
When we are racist, we are arrogant, God tells us NOT to be arrogant:
(31:18) "You shall not treat the people with arrogance, nor shall you roam the earth proudly. GOD does not like the arrogant showoffs.
So whenever this feeling of racial biases comes up inside you, recognize it for what it is: as nothing but a thought initiated by Satan. But don't condemn yourself for having this thought, just realize that it is NOT YOUR thought (it's from Satan), seek refuge in God (7:201), and enjoy the presence of God's creation in all its colors as it is.
(30:22)Among His proofs are the creation of the heavens and the earth, and the variations in your languages and your colors. In these, there are signs for the knowledgeable.
I pray this helps