If your bitch is KC registered then she will, more than likely, be on the anadune web site. A fabulous site that tells you all about coat colours and what colours are carried by your line. It has ISDS registered dogs also, but I'm pretty sure that the data is coming from the KC source, as my ISDS litter I added on myself.
www.anadune.com
If your bitch is on, you can do a test mating ... putting in the name of a dog you like the look of. This will bring up all the possible coat colours that will appear in a litter, together with whether smooth, rough, etc. There's a section that tells you about the coat colours and which are dominant/recessive.
You can also look through a 5-generation pedigree to see where the coat colours are coming through from - can do all the genetics on this too. Well worth a look.
A really good site. You do have to register to use the database but that only takes a few days via e-mail. The coat colours and general info you can see without registering.
This is another good site explaining about the colours:
http://www.mastamariner.com/border_collie_colours_page.htmlThe above are really easy to understand and have pictures ... pictures also help!!
This one's a bit more technical, I'm not so familiar with this site, but the glances I've had it seems quite useful:
http://www.bordercolliecolors.com/bordercolliecolors.genetic.lingo.htmlHappy reading
Edit: oops, just spotted where you're based, so your dog might not be KC registered ... though the father of 1 of mine now lives in Germany and is KC reg!! It's an American based site, so it's border collies worldwide. I've just been guessing at where they get their info!