The standard provides:
COLOUR: pale fawn overlaid with black (wolf-grey) of different tones, often lighter on lateral parts and darker on the upper part of the body. Pale fawn overlaid with black (wolf-grey) with white marks preferably non predominant.
with white marks preferably non predominant.:
ELIMINATING FAULTS: Colour : brown, brindle, yellow, or flecked in these colours.