We actually never see R2 enter the pod though - when he opens the door, he is actually going through an entry tunnel of some kind made of a reflective material. R2 stops next to a door bathed in blue light at the end of the tunnel, but in several shots the blue light is gone and it’s just reflecting the brownish gray of the surrounding set.
Since Image Shack is down for now:
Escape Pod Colors
You can clearly see the end of the access tunnel when the pod ejects from the ship. Granted, there are no visible doors on the side of the pod, but nothing about the pod makes sense as there is also no window looking back on the Star Destroyer. The people in charge of making sense of these things apparently also gave up and put the window on the side of the pod:
And the prop used in the desert doesn’t look like the model:
Too bad it’s in black and white, but the interior of the pod appears gray in all of the releases, it’s just the door that is blue.
In short, there’s no evidence one way or another as to what the pod door looks like except what is seen in the desert.
JEDIT: @Towne: That’s a good point. I’m going to see how the blue door looks with my final grading.