Markings

Border Collies come in a wide range of colors and markings. The American Kennel Club allows all colors...

American Kennel Club

"The Border Collie appears in all colors or combination of colors and/or markings. Solid color, bi-color, tri-color, merle and sable dogs are to be judged equally with no one color or pattern preferred over another. White markings may be clear white or ticked to any degree. Random white patches on the body and head are permissible but should not predominate."

...however most commonly seen are the black-and-white dogs. The only coloration not allowed in the Border Collie is Albino.

Breed information from the American Kennel Club Breed Standard.