When comparing the Border Collie Breed Standard for showing in different countries there is some interesting variation. Acceptance of erect ears in some countries, being one.
Australia appears to be the most specific in terms of coat colours permissible in the standard. New Zealand, UK and Canada state that a variety of colours are permissible, but white should not predominate.
In the American standard the Border Collie appears in all colours or combination of colours and/or markings. Solid colour, bi-colour, tri-colour, merle and sable dogs are to be judged equally with no one colour 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. Colour and markings are always secondary to physical evaluation and gait.
The Australian standard (recognised by the Kennel Council) includes: black and white, blue and white, chocolate and white, red and white, blue merle and the tri-colour black, tan and white. In each case the basic body colour must predominate and be the background colour of the dog. It is interesting that the blue merle coat is acceptable in the standard, but not the red or chocolate merle. Similarly, the tri-colour black, tan and white is included, but not the tri colour chocolate, tan and white.