I know there are different printed colors but there were different stock colors as well. The ones Leon shows look to be on the white stock. Here are a couple I had found on green stock and pink stock. This is what I had found on FKW Century old cards.
http://centuryoldcards.com/1930/1933E285.html
I don't think the different stock colors come up very often as most I have seen or red, blue and green ink on the white stock. The ones I picked up recently seem to be on the pink stock but don't have them in hand yet to tell. I've attached mine as well as they have the white borders just a lot of chipping on a few on the back is all.
Thanks for all the input guys.