Just a note about Model T colors, see the link
http://www.modelt.org/rpaint.html
The original Model T colors were not black on the body,
the colors changed from year to year. In 1915, they went
to black to keep the cost down (black was the cheapest). Note that a lot of the early colors were very dark and looked almost black. After 1925, Henry had to catch up with the competition and introduced colors again. Model A Fords were not availaible in Black in 28/29, see this link:
http://www.ahooga.com/info/black.shtml

Note that the fender color was usually black, regardless of the body color....