There are a few sources that show it as blue 1, and some that show it with a yellow rudder.
I have some scans of black and white photos of the kill bars on the rudder as well as this or another plane in the same gruppe.
The rudder most definitely looks white. There is no difference in the shades used on the black-and-white kill bars vs the rudder itself. All references show black and white kill markings, even on yellow rudders. Not black outlines with yellow rudder showing through. Always white. Thus the rudder almost certainly is also white.
As for the blue markings -- I tend to lean more towards yellow markings. Going by the other shades of grey in the black-and-white photos it doesn't appear likely to be blue.
So, using the many conflicting online references as well as a number of scans from some nice books I found at the local library (purely on accident! It was quite refreshing to turn the page and get a nice close-up of the killboard I was working on!) I came up with the best representation.
I do believe the "1" was yellow, and that the rudder was white, hence, why I skinned it this way.
Just a history of the research I put into this skin.
