[bjh]

This is taken from the Skye Terrier standard:

Color
The coat must be of one over-all color at the skin but may be of varying shades of the same color in the full coat, which may be black, blue, dark or light grey, silver platinum, fawn or cream. The dog must have no distinctive markings except for the desirable black points of ears, muzzle and tip of tail, all of which points are preferably dark even to black. The shade of head and legs should approximate that of the body. There must be no trace of pattern, design or clear-cut color variations, with the exception of the breed's only permissible white which occasionally exists on the chest not exceeding 2 inches in diameter.

The puppy coat may be very different in color from the adult coat. Therefore, as it is growing and clearing, wide variations of color may occur; consequently, this is permissible in dogs under 18 months of age. However, even in puppies there must be no trace of pattern, design, or clear-cut variations with the exception of the black band encircling the body coat of the creme colored dog, and the only permissible white which, as in the adult dog, occasionally exists on the chest not exceeding 2 inches in diameter.

Disqualification
A Dudley, flesh-colored or brown nose shall disqualify.

I did a quick search for parti skye terriers and could not find any references to them.