There's some debate over the matter of DVD (and any home format, for that matter) being able to reproduce the colors as accurately as film. Colorspace of standard ntsc, mpeg2, etc., etc. I don't know the details exactly. The DVDs are, however, supposed to have been closer to the original films, as they did not recolor them like they did on the blue ray EE set.

IMO, at least kk got rid of the green tint. From what I saw, they aren't as "perfect " as they could be, but are less green tinted than the source he worked from.