On set video (from OCP Movie’s Deleted Magic) shows that there was a blue light in the escape pod:
Cool! So, that’s another thing we definitely can confirm was part of the original color grading.
The blue light comes and goes depending on the shot. It is present about half the time. R2 should be very blue when the light is on and he has entered the pod. It is one of those things on my list to correct with my edit, but not with my BR restoration. Just one of those warts we have to live with.