So I hear you pointing out the obvious. This was done from a video pointed at a 35mm showing. The white balance could be off. The exposure could be wrong. A hundred thing could be wrong. And you know what, that's right so let's look at show other sources.
So lets look at the 35mm frames Servo posted from ebay.
Pretty dark blue bias. You could say its wrong since you are not looking at these through a theater projector with a correct bulb but they do look strangely close to the dark blue scenes from the video. Look at the pics I posted in 186. (Indecently, these strips say AFGA so they are more then likely from a European print)
Let look at some 35mm frames I found.
Again not perfect but much closer.
Part 3, looking at the 8mm, a little later but look at post 186 and look at the 8mm (1st page) Terminator in the flames, the Sarah dream, the purple in the hallway in the 1st T-800 vs T-1000 battle