Hi, If you are asking what a bi-blue sheltie looks like, simply put the dog is white, black and silver, no tan. It is a bi-black sheltie with the merle gene. Oh, if you look on my profile, you will see that Clipper, my soon-to-be puppy is a bi-blue, and Chinook, is a blue-merle. Hope it helps. You can also google 'sheltie colors' and you will find many web sites with pictures of all the colors. And you can probably look under the 'breeding' section on this forum and get some more answers.