Here's what High-Def Digest says:
There are those moments where the changes seem hard to miss. Mists, which appear white in previous releases, now have an odd tinge to them, as they are no longer pure or unsullied, and what was once beautifully clean, white snow can look like someone was making snow cones with watered down dye. The title card for the film has a very slight hint of green to it, as well, while rocks in the shire have an odd taint that isn't from moss. Arwen's dress, which originally looked like a sparkly, completely white beauty in Frodo's hallucination, now looks like beautiful emerald, like a key lime pie, and the moment before, where Aragorn fights the Ring Wraights, their cloaks and his attire have olive hints and tints. Skin tones wear this issue, as well, as there are more than a few moments in the film where characters look ashen due to the way red levels are overpowered by greens, when they aren't excessively affected by lighting, far more than the other films in the set. The cyan tints are odd, and make some random sky shots a massive distraction with their new peculiar tint, while there are times where actors look like they have spider veins. That's not good.
