Due to someone (ahem) bringing up the point of the foals' colors not being correct, I decided to make a simplified table of the different colors. Hopefully simplified. Some more complex/rare colors will be listed with the colors needed to make them.
There are three basic colors for this, for the sake of simplicity: gray, brown and chestnut. All other colors fall under these listings. The bolded color is the main color, and the others listed are more detailed colors.
Gray
Gray
Black
White
Cremello (Cream)
Brown
Brown
Bay
Dun
Buckskin
Chestnut
Chestnut
Palomino
Sorrel
Mixes
Grullo (Gray and Brown)
Pinto (Gray and any color)
Roan (Gray and any color)
Well how does this work? I've put the lists in order of dominance. Gray is uber-dominant; that is, it is dominant above Brown and Chestnut. The parent with a Gray color will have their foal a Gray color, no matter what. Brown is recessive to Gray but dominant over Chestnut, and so with a Gray will have a Gray foal but with a Chestnut will have a Brown foal. You must have two Chestnut parents to get a Chestnut.
Now, you may ask where the paints/pintos, roans, and other colors go. The simple answer to that is that those colors are usually white and another color. So that horse's color would fall under the appropriate category. A tri-colored pinto would be under Brown because its base color is bay, which is a Brown color. A sorrel pinto would be Chestnut, and a gray pinto would be Gray. The same goes for roans and Appaloosas: the other color would be the deciding factor. However, to get a roan or pinto, you need to have a Gray parent as one of the parents, and any of the three as the other. You also need one or both of the parents to be a pinto. With Appaloosas, you can just have the foal be the Appaloosa parent's pattern (leopard, blanket, etc.). Here's where more mixing comes in to decide the actual color.
Also, there's that little "Takes After" part on the foal's stats. For that, just put in the parent with the dominant color. If the parents' colors are the same (Brown and Brown, etc.) then flip a coin as usual for the color.
If you have any questions about this or think a color should be somewhere different or just any problems, let me know by either posting here or PMing me. Also, if I've forgotten a color in my total insanity, let me know, and I'll add it.
You don't have to use this if you don't want to, but if you want to be at least slightly scientific, then you are welcome to use this. You can still use our mixing method to get the exact shade/color of the foal, but this is just a basic guide. And once we start having grandbabies on the site, then I'll introduce a new part: multiple traits! Whoopie.
Examples:Black (Gray) x Chestnut (Chestnut) = Black foal
Palomino (Chestnut) x Chestnut (Chestnut) = Palomino or Chestnut foal
Bay (Brown) x Gray (Gray) = Gray foal, very rarely Silver Bay!
Tri-colored Pinto (Brown) x Black (Gray) = Gray pinto