I've no idea what I would to call the buff looking bird. But it's not a Standard color. Personally, because I'm showing and breeding for the SOP (standard of perfection) and I'm trying to be very ethical in my breedings (as is most everyone else on this thread), I am not interested in breeding birds with off colors, wrong colors or colors that are not standard. I might be tempted to pick up an AOV-- I really love the Columbian color. The most popular AOV's are paint, porcelain, blue partridge... those are the ones I see at shows the most. There are many other project colors, but there is a specific goal in mind for the breeders working with those colors. So if you are wanting an AOV, I'd work with something that is already in progress so you can learn the genetics behind it and get help when you go off track.
If I were you, I'd think about what your goals are for yourself and your birds. What do you want to do with them? Start with what colors interest you the most and research them before you dive in. Some colors are just very difficult to work with, and if that is a deterrent, then decide if that is something you want to face-- with lots of potential culls from your breedings. Some colors are just much easier to work with. Some colors also show better than others. I'm finding the BBS colors easy to work with color wise, because I never ever breed anything with leakage, and so far (knock on wood) have not had that pop up. But then, past that, the rest of the stuff comes into play, we are working on type, as I think we have decent birds, but nothing that is "WOW" on the type so far. At the same time, I've had to eliminate my two best grow-out birds that popped up with the BEST type I had all year this summer because the wings were so bad! I was tempted to breed them anyway for the type, but just couldn't bring myself to continue on with a problem that is hard to get rid of (the wings). I know the wings are going to crop up time and time again for me anyway because I had good birds resulting from that same breeding. I'll be having to cull for that for a while is my guess even with my good birds because I figure that will still try to pass on anyway .
So just knowing that your best looking birds can produce some really bad offspring is also something to keep in mind. Just because you start with fantastic birds doesn't mean you'll get fantastic results... BUT your odds are sooooo much better! By doing that, you should have eliminated a lot of faults by starting with better birds (like maybe wings, comb, color, etc), but things can still pop up. It's just something to keep in mind. I was talking to one of the top pigeon breeders this last weekend at a show-- he raises them and is a Judge and judges all over the world (he is judging in Norway next month) and can sell one pigeon for more than 1K! I only tell you this, because I respect his opinion and think very highly of him and he has great advice. He told me to cull until it hurts even if it leaves you with very few birds. NEVER breed anything you don't want to see again and when you are finally at a spot you want to be, to breed birds that look related (but aren't) together to maintain your line and keep your type. He out crosses to other colors to bring in new blood (out of his own birds) to bring back in his type and breed back for color. So he has a pen working for nothing other than breeding back to color-- not for breeding to his top birds. Then those birds that make the cut will then be used only when they meet his criteria back into color and they've maintained the type. Then he takes them to breed in new blood and keep it fresh. He said he does not buy birds anymore. It's almost like a Spiral/Rotational breeding but without the relation. He is against Line breeding. He's very interesting to talk to. I hope that makes sense. It's like breeding out to white JUST to get the type you want. It's not something you really want to do often-- if ever-- unless you just can't get the type any other way. But with silkies, there are so many good birds out there, I don't know if it's going to be necessary unless you are working on a project color. Or if you are really good with genetics, then it's something you could tackle and realize it will take a few generations to get color back.
Anyway... that's just my opinion!! I hope some of that helped. I am not a genetics guru like Sonoran!