David's answer to my question about the shade of blue for YF-19 custom:
Re:YF-19 Custom Blue, Jan 26 2008, 12:10 AM
The problem is, while the blue and orange YF-19's seem to be based off the F-15 prototypes, the colors are quite different. There is no "real" or "military" match for them that'd look similar. Following the real F-15's would make the blue MUCH darker, and the orange would be day-glo.