I'mma be helpful and link my favorite visual resource for horse colors, as well as my favorite gene tester/game/thing.
http://majnouna.deviantart.com/art/Guid ... -243666224 Awesome poster showing different colors of same genetic makeups, including eye colors, face and leg markings, non-inheritable markings, etc.
http://www.jenniferhoffman.net/horse/ho ... etics.html Great tool for playing with genes and seeing just what happens when you add/take away certain modifiers. Not as comprehensive as poster.
http://www.animalgenetics.us/Equine/CCalculator1.asp Fantastic way to predict the colors of foals when you know the colors of the parents, with some wiggle depending on whether or not you know what recessive genes are hiding out.
I have used these three resources with great frequency, they're really helpful.