So I've been trying to figure this out, and it doesn't seem to say anywhere in the knowledge books or forums (or I just am not searching for the right terms).
When you look at the listing of caches in an area, some of the caches have a white, light grey, or dark grey background. I know the peach is my own listing, and green is good for beginners, but what do the other colours mean?
Likewise, when I'm looking at my trackables page, the location of the trackable sometimes has a grey background, or a green background. Are the green background ones items that have recently moved, changed hands, or...?
Sorry if this is a dumb question and already listed somewhere.