They are not as cobby as the British Shorthair, and they do not have the beautiful round head shape. Below is an image of an early British Blue. This resulted in the blue colour that we know and love entering the British Shorthair breed to create the British Blue. British Shorthairs were bred with Russian blues. The blue colour, which is in fact a beautiful grey colour, was introduced to the breed from the Russian Blue breed. We can trace the ancestry of some of our cats back to 1908, and we have even found some photographs of the original British Shorthair cats that started the line all those years ago. Originally, all British Shorthair cats were tabby cats. What a beauty she is! History of the British Blue The picture above is our British Blue queen. The British Blue, or blue British Shorthair, is the best known and most recognisable of all of the many colours of the British Shorthair cat.