The red and yellow combination is a favorite.
I found this great ca. 1880 red paisley fabric recently. One way you can tell this is not new fabric is the selvage width--this fabric has both selvedges and it is 24 inches wide. Modern fabrics are 45" and vintage fabrics (when I was a kid--yes, I am vintage, but not antique) fabrics were 36". These are general guidelines, there will be exceptions.
The stuffed ornaments I make have a button tied in the middle, to give the look of a tiny tufted pillow. I had been using new buttons but then decided to look for some vintage buttons on ebay. Well, I found plenty. Here are some cool ones from the 1960's. These must have been the salesmen samples that stores ordered from. Check out the prices, and that's not per button, but probably per card of buttons.