It is almost impossible to give exact colors of the puppies when they are young. Breeding for colors will take you nowhere, like picking the pup because of the color will be of no use. Our breed can change colors a lot because of the brindle gene. Brindle means that the coat is striped like a tiger. The single stray of hair has variation in color, normally dark at the skin and lighter at the tip. A cairn terrier coat should never be spotted like a giraffe. 

Color Changes

Some of the cairns go through dramatic color changes.
Here is a few samples of the 2 dogs at different ages

Fault in colors

Colored like an Airedale & Australian Terriers
This part is from the rear thigh 

©Berit Rosenfeldt www.cairn.dk

I want to give Berit a special thanks for the use of her color chart.