#<hostname>:<colo>:<zone>:<color>:<username>:<password>

lb1.example.com:colo1:blue:306EFF:username:password
lb2.example.com:colo1:green:348017:username:password
lb3.example.com:colo2:blue:306EFF:username:password
lb4.example.com:colo2:green:348017:username:password