Wow... I just got on here to get a more of an opinon, and to learn. I really don't need responses that don't help. As I have gotten diffrent answers from other people. My goal isn't to breed show chins. Just chins that are a good quality. As my local petstore buys my standards from me. And it would be nice to have other colors. And I read that a mutation to a mutation was not a great idea. So I was not sure after reading that if I should separate my two or not. I tried to post pic earlier today, but I don't have good internet.
If you're going to breed, then you should breed to the show standard. "Good quality" chinchillas are show quality chinchillas. Breeding for colors or "cute babies" is absolutely pointless, it depletes the vigor in the gene pool. There is no reason to produce pet only quality chinchillas because you'd be ruining what responsible breeders and ranchers have worked so hard to achieve.
You were given an opinion, just an opinion you didn't want to hear. Please think about what you're doing and listen to those with experience.
As far as breeding beige and ebony together - you want animals that compliment each other, regardless of mutation. Whether it be standard to standard or mute to mute, you don't want to put two lacking qualities together as you take a risk at intensifying that trait and making it even worse. When mating multiple mutations, you take the risk of losing size and quality in your animals if you dont add quality standards into the lines every other generation. You have to be careful when pairing mutes, as you want to improve on their mutation, not decrease the quality in the mutation just for a hybrid color. If both animals are already lacking size, then they both need to be complimented to larger animals to keep size in the lines. I would personally suggest showing your animals so that you know how to compliment them.