There are several good sites on the internet that provide information on color genetics. We recommend that you check them out and choose which one that suits you the best. We also highly recommend the book Equine Color Genetics by D. Phillip Sponenberg. Please visit the links below for more information on this subject.
We are in process of testing our stallions for their individual genetic breakdowns, please see their pages for results! Thank you 
http://www.animalgenetics.us/CCalculator1.asp
http://www.equinecolor.com/
http://www.vgl.ucdavis.edu/~lvmillon/coatcolor/coatclr3.html
