Many hadiths describe Mohammed as a white Arab who owned African slaves.
Hadith al-Bukhari, Vol. 1, Book 3, No. 63: “'Who amongst you is Muhammad?' At that time the Prophet was sitting amongst us leaning on his arm. We replied, 'This white man reclining on his arm.'”
Hadith al-Bukhari, Vol. 4, Book 56, No. 744: “'I saw the Prophet, and Al-Hasan bin Ali resembled him.' I said to Abu-Juhaifa, 'Describe him for me.' He said, 'He was white and his beard was black with some white hair.'”
Hadith al-Bukhari, Vol. 2, Book 17, No. 141: "The Prophet never raised his hands for any invocation except for that of Istisqa’ and he used to raise them so much that the whiteness of his armpits became visible."
Hadith al-Bukhari, Vol. 1, Book 8, No. 367: "The Prophet rode and Abu Talha rode too and I was riding behind Abu Talha. The Prophet passed through the lane of Khaibar quickly and my knee was touching the thigh of the Prophet. He uncovered his thigh and I saw the whiteness of the thigh of the Prophet."
Hadith al-Bukhari, Vol. 2, Book 17, No. 122: “I heard Ibn ‘Umar reciting the poetic verses of Abu Talib: And a white (person) (i.e. the Prophet) who is requested to pray for rain.”