By original definition, CREOLE refers to people of European cultures who were born in the colonies - English, French, Spanish etc

Webster:
http://www.dinsdoc.com/goodell-1-3-1.htm

Brittanica:
http://www.britannica.com/eb/article-9027845/Creole

In Louisiana usage, the term generally seems to "imply" there was a certain part of African heritage in the mix

Wikipedia has s nice article on FPOC:
http://www.answers.com/topic/free-people-of-color

http://www.answers.com/topic/free-people-of-color

FPOC in New Orleans:
http://www.frenchquarter.com/history/freepeople.php

New York:
http://chnm.gmu.edu/lostmuseum/lm/118/

best of all: