Looks like the commercial "urban camo" pattern that first popped up in either the late 80's or early 90's.
I'm assuming the facilities that print camo pattern cloth can probably be configured to use whatever colors you put in there - our local "surplus" store has been selling "camouflage" BDU-pattern clothing in a variety of outlandish colors: Red, orange and black, purple, blue. black, and the "urban camo" where some of the traditional BDU colors are replaced with black, white and gray.
IIRC the "urban camo" was briefly popular in civilian clothing in the early 2000s as well. I have a motorcycle jacket that uses an "urban camo" pattern on some of the panels.
So I don't think this is so much a case of the USAF developing some new or experimental camo as it is a case of them buying off-the-shelf commercial products and using them (from the photos provided, at least) not as a real 'camouflage' but rather as some kind of promotional/public relations thing.