In 2 and a half months, 2 users went from white to black level, they are niceboy_ed and Zest. Good job fellas! Also Geoo went up 10 levels as well, from Dark Green all the way to TV star - Wow, simply Incredible!
EDIT: #Zest actually bought silver after I posted this so 10 colour levels
BigBrotherSuperToMe
Diancie
Tone from Sky
@SugarCrash
nipple_berry69
Dalvin from Sky
Cella
rory17
motherbird from Black