That being said, do not put too much stock in rankings, and put even less in colored rank belts. Belt colors are HIGHLY dependent on the art, school, and instructor. Some arts don't have any belts. Some have only white and black. Some have white, brown, and black. Some have a rainbow. Some instructors hand out rank/belts like candy, others are very stingy. A given color will frequently signify different ranks in different arts.