well there was anywhere in a guide a list but i dont find it yet, ill try to do it from my mind :
White belt = 0 QI
Yellow = 20 QI
Orange = 100 QI
Blue = (i dont know how much :s)
Brown = 500 QI
Black = 1000 QI
2nd Dan Black = 2000 QI
(every 1000 fights u get a 3rd , 4th, 5th dan black belt and so on)
10th dan black = 10000
Master = 15000
Custom ( u can set your own name as it) = 20000
God (only 3 people reached this so far) = 50000
One belt = 100.000
Elite belt = well im not sure but i think it was 500.000
at 3 million QI your QI will be resettet and youre a white belt. (1 QI is one fight in multiplayer, doesnt matter if win or lose)