
It's not a silly question at all...In fact its a very sencible question!!!! Border collies can be showen in black bi (most common) as well as red bi and redtris and black tris and red and blue merles BUT alot of judges can't see past colour (sometimes a problem in breed with different colours) and they are releated to as "colour blind" (incase you ever hear that term mentiond)
Black bi border collies do most of the winning, they are the most popular colour and there fore in the higher majority to win...judges will also be "afraid" to put a different colour up although I personally think tri border collies are lovely. If you want to show a red then you will have no problems...most judges will give you place you deserve...you can show them.
Currently we have a red border collie puppy at our ringcraft which will hopefully go into the ring when he is old enough!!
Reds and tris will also be harder to find as most show breeders will have black bi. But if you do your homework I am sure there are tri coloured show breeders who will have the puppy for you!
Rox