The Coast Guard for some reason liked the USAF blues so much that they went to them.
I recall back in 97' for the USAF 50th they allowed us to wear for a whole week any old USAF uniforms so long as they had our name tapes and correct (for that time period) ranks that was pretty cool some guys wore old WWII Air Corps/AAF stuff but many worn the old Tans that they got rid of in 68 or so.
The Tans where so popular afterwords that they even listed it on USAF uniforms surveys later in the lists of "desired" uniforms one of them was asking if you would like to see a return of the tan dress uniform and many people said yes according to the results that they printed out later but so far they have never gone back to them.
I think it has to do with politics though.I recall when before they went to the current USAF emblem (which I think is horrid) they did many surveys one that they e-mailed to every AF members .mil address asking questions about how they felt about the old emblem and the new one.Many of the questions where very vague in nature which was obviously done so that the new emblem would win out. Most guys liked the old emblem and wanted to see a new design of similar style because the new emblem in no way had esprit de corps of the old days of WWII AAF which the old emblem did.In my shop most everyone disliked the new emblem.I was in another shop across base and here is this NCO
telling his troops that they like the emblem that is how it goes they already decided and they make you think you have a choice in things that represent your branch of service to the public same goes for the uniforms it just turned out that the brass at my shop was more liberal on that subject.