From that photo i can't see any color difference? Not being there in person makes it hard to judge but i would not be woried about his feet colour as this could be just a pigmentation difference in his fet. But there is always the possibility that he does have circulation problems although i doubt it!. Anyway if you are still worried about his feet i suggest that you visit your vet and get him checked out.
Thank you for the link Wendy! I did send the pics to the avian vet and he prescribed light therapy for 2 weeks. Said it might be circulation according to the photos. Not 100% sure about the connection or how one will help the other, but he has not been wrong so far, Lol.