This article is from the Afghan Hound Breed FAQ, by Janis Nixon with numerous contributions by others.
Afghans come in all colours but spots, but white or white markings,
especially on the face, are frowned on. The most common colours are
black, black and tan and black-masked red. One of the Afghan's most
engaging points is the rainbow he can come adorned in! Aside from the
usual colours, there are delicate blue-greys, stripey brindles of all
hues, navy blues, silvery creams, and various combinations thereof,
all with or without masking. One of the most unusual colours is
"domino," where the dog's face colour is lighter than the body coat
with a darker reverse mask beginning over the eyes, like a Mickey
Mouse cap effect. In all colours, the eye rims, lips and nose leathers
must be dark in pigment. Mere words pale beside the kaleidoscope of
colours that Afghans can wear.