The block is black, the intake and valve cover are natural (slightly matte, NOT shiny) aluminum. Use the main search function (the one in the same line as "Home, Help, etc..." there is quite a trove of information about the proper finishes, clamps, and such. Also many pictures.
Check out Pagoda Notes, Vol 9 no 2 (available to full members from the technical manual pages - scroll down to the premium content links) for detailed information on how the main search function works