Not sure I saw any color codes anywhere on them will have a look.justjim; I concur with you that they are color coded, I'm just not sure on the color order. If I recall correctly, you can play around and find they fit only a certain way.
Deputydog has a good point about front and rear windshields out to do it. If left in , it is achievable, but quite frustrating. I was happy mine came out quite well, and I saved 500 that I used somewhere else.