Does anyone know how customizable the watch face is? In all of the Apple stock photos, the numbers on the watch face match the color of the Sport band attached. Since Apple has chosen to sell these watches as a watch plus band combo, is it possible that the band color has been preprogrammed into the watch itself? In other words, if I buy a pink sport watch and then switch out the band for a blue one, will I also be able to switch the font on the face to be blue?