Didn't notice this thread right away...
It's good to hear from people nearby... kamusta kayo diyan!!!
anyway this is the system in the dojo I originally came from:
White - 6th Kyu
Green - 5th Kyu
yellow - 4th Kyu
Purple - 3rd Kyu
Blue - 2nd Kyu
Brown - 1st Kyu
BLACK - Shodan