Sorry for the late reply.
The files in the thumbnail go from left to right. So #1 is in the top left corner, #2 is next to it, #9 is right below it, etc.
As for color versions, I have thought of doing either a formal or informal poll asking if ya'll would prefer color versions, black and white, or even both. I've been doing b&w because I figure color cameras and film was too expensive to buy and develop back then, so b&w was more "realistic." But I can do color if that's what ya'll want!