What do the colors of weather report (METAR) ages mean?

The colored text indicating the age of METARS on the Airports page correlates to time as follows:

- Green text is weather information that is 0 to 5 min old.
- Blue text is weather information that is 6 to 30 minutes old. 
- Orange text is weather information that is 31-60 minutes old.
- Red text is weather information that is over 60 minutes old.

 
 
Image 1.  Color coded METAR age on the Airports page.