The special effects shots will look different because they are composited. The goal of most of us is to get the entire film to look as good as it can while staying true to the original look. That includes the flaws in the special effects shots. Unless the shots have been recomposited to a better standard, we are stuck with the original and SE composites. The shot in question of Luke does not appear to have been touched since the May 1977 release so we are dealing with 1977 compositing done on Vistavision film (60 mm on its side) and then transferred to 35 mm negative to splice into the O-neg. This clip appears to be in much better shape and the colors on the blu-ray are very close to what all the other sources have so it really isn’t in that bad a shape, but it does suffer from reduced yellow like most of ANH on blu-ray does. But the clip as it appears in the Technicolor print scan shows higher contrast than most of the other sources. Between the sources, there is no evidence for a color shift.