I remember ImpFighter... then he changed his mind again and said they would go back to grey.
Personally, I do not like the blue TIEs at all; the color makes them look more like models (imagine the air force or navy painting an F-15 that color). The TIE bombers and the newer ones in JEDI are one thing, but retconning ANH is something else. Forget about EU stuff... just visually I rather have continuity with ANH than go in reverse. Even if they are to remain blue or bluish, PLEASE don't change their color when you get around to ANH:720p.