Does a Person's Skin Color Affect the Noticeability of hair transplant Scars?

Skin color affects hair transplants.  Dark skin and dark hair is great because even the scabbing looks like hair.  Basically you want the least amount of contrast.  

Skin color does not so much affect transplant scars as does ethnic background. Certain ethnicities, such as people of African or Asian descent, have a higher tendency to keloid than Caucasians. However, with a refined surgical technique, such as advanced follicular unit extraction using uGraft (which is scalpel-free), scarring should not be a problem. Especially in the care of an experienced surgeon.

I have performed hair transplants on people of color with success.  The scar quality depends on many factors.  Keloids are concern but if there is not a history then scars should not be obvious.

Dr ES 

Yes, generally speaking the best results are when there is the least amount of colour contrast between the hair and the skinIn other words, the most demanding hair transplant is likely to be in pale white skin and very dark coarse hair

Excellent question if skin and hair color have significant impact on the results of hair tranplant.  If there is low color contrast, such as blonde hair with light skin or dark hair with dark skin, that is low color contrast and enhances the result and makes it more natural.  If the opposite...high color contrast...black hair on light skin or light hair on dark skin, the surgeon must be very careful with technique to keep grafts natural.