While they come in a variety of shades from cream to black, blue was not a permitted color. In fact, puppies who started to turn blue were destroyed by early breeders. It is now recognized, however, and quite common.
The Royal Irish Regiment of the British Army still uses an Irish wolfhound as a mascot.
In Scotland, a few Irish wolfhounds have been used for herding; they introduced them to sheep through a pet lamb in the kitchen to teach the dog sheep were family, not prey.