One’s skin and hair colors do not affect the hair transplant surgery. And yet, in a person with fair complexion the scalp can become red easily, and it can show the scars, burn marks, or the incisions. However, in a person with darker skin, such defects are not easily noticeable. Skin color only has an impact in that sense.
Also, the hair type is important. Curly and wavy hair give better hair transplantation results because they have more coverage, and with fewer grafts, we can get a better look: More coverage, and as if more hair has been transplanted.