Other than the one who bred it. You could breed two pure sandfire reds together but they all won't come out looking like a "pure" sandfire reds. You might get some orange ones, yellow ones, red ones, & some who look like a "normal" dragon. One thing to keep in mind is, they are all carrying the same genes. Especially now days with sooooo many mixes out there, there are no straight forward color phases. I think you are confusing color with a type of "breed". These are not dogs. You can breed any two colors together & it's not going to make it a mutt or mix breed or hybrid. They are all colors of the same kind of dragon.
Soooo, the compatible color for your dragon is........... What ever color you want (providing they are not related)
Good luck.
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Joel R
Coming some day.
www.SpikesAndScales.com