Motorola Atrix 4G :: Signal Indicators Turning Grey?

The WiFi and celluar signal icons will occasionally turn grey for a minute, and then go back to blue.I thought that this meant there was a loss of connectivity, however when the icons turn grey I can still connect to the Internet and the signal bars always indicate a strong signal when this happens. I suppose it's possible that connectivity was actually lost for a moment, and it may take the icons a few seconds to update back to the blue color again, hard to say.