Looking at a couple of the youtube clips of Adywans upcoming ESB Revisited, i feel that some of the removal of the blueish hue in the Hoth scenes done in the name of color correction are in error.

Especially in the outdoor scenes, some of the shadows in the snowy enviroment should have a blue tint, seeing as shadows are lit by indirect light which for the most part consists of atmospheric scattering and to some part light reflected from the snow in the enviroment, my 2c...

EDIT: Here's some of my army photos from couple years back to show what i'm talking about