CYBERFACE i need help

i know how to cut the cheeks, eyes, forehead , etc out of a picture and paste it to the cyberface im editing and all but heres my problem


i dont know how to match the colors


like i was editing lebron james b hed

i got a pic of lebron


now i cut everything out and pasted it, but wat i pasted on the bhed doesnt match the color of the surrounding face...can anyone help me

please???