I loved the blue tint because it fit Twilight so well. It made the vampires seem actually cold and the reds really pop out when they were used.
Now that I'm thinking about it, Twilight takes place during the winter months right? Icy roads etc and New Moon takes place during the fall/spring? Her bday in Sept, learning to ride the motorcycle and stuff in the spring?
Ok, yeah, the palette change is making more and more sense to me.
Plus you can't have a yellow Porsche in Italy and have that be in blue tones.