You will find herein the most frequent Border Collie colours, which coat may be of different colors, from black and white, to red merle, blue merle, brown or chocolate, or combinations and variations of these.
Anyway, and even if, from an aesthetic point of view, each person may be kind of any of these colours -from the most frequent to the rarest- it is true that is just another element to be taken into account, together with others not less important than the color is, such us the instinct and skills at work, essentials of the breed, together with those of the standard.
Again, as it couldn't be otherwise, genetics plays the main rol. The concurrence of genes -dominant and / or recessive - will bring about our dog has a coat coulour or another. The coat color, as well as mucous of our dog is determined by melanin, a pigment that may be eumelanin and phaeomelanin.
Depending on how they affect the coat colour, genes may classified as affecting the basic colors, and genes modifying these. Variety of colours is permitted by the standard, even if white should never predominate.