This Panzer I ausf A at Munster has orange and white (clear);
Then again, I'm pretty sure this is not correct, it appears to be the museum's artistic license, (probably), as it looks like a US Army tail light, and it doesn't look like the one photo I can find, (so far) of a very small, tubular-type in the same location;
This photo of an Ausf A shows what I believe you are looking for;
This light would have a orange lens on top and a red lens on the bottom, as seen on this SdKfz 10;
I haven't been able to find a good photo of the rear of an Ausf B with the tail light still intact, so I'm not sure if I've got the right one yet.
This photo of an Ausf B, (in color even!) shows something completely different;
Finally! These are surprisingly hard to find;
These were later changed, (for the most part), to the standard early-type convoy lights with the shutter, as early as the Norway campaign, if not before.