What does a grey Wi-Fi icon mean? Possible Duplicate:
  What does it mean when the connectivity icons in the status bar go white/gray?  




I've been searching google for this and I haven't been able to find a clear answer for this. Some say it's "insecure connection to Google servers", others say it's only blue when it's syncing etc.

The idea is that connecting to two different WiFi routers I get different icons.
One shows blue, the other grey. The only difference between them is that the one that shows grey uses a certificate to authenticate, while the blue one uses a password, like any regular router.

So what's up?
Its whether or not you've currently got a connection to Google's servers for sync services such as syncing contacts. Gray means you don't but blue means you do.