I'm also working on a blue Sebright, I have 2 blue Hens with Sebright blood in them and an order in for Silver 'Brights. Colors are what it's all about...There's no Blue 'Bright in the SoP, either, nor a Buff, but I see Buffs for sale, at Ideal Hatcheries and from the man where I got my 3 new 'Brights this past Saturday. I understand you Breed a Golden Roo with a Silver Hen. I have THAT combination, now. Soooo....here come the Buffs.
I always love to see the colors people come up with, and the EE's are so wonderful for doing that. I can't see how anyone would balk at someone attempting a new and beautiful color combo. My Olive Eggers are beautiful Golden Amie appearing, with blue rear halves. They are some of my most beautiful chickens, and they're Hens. I also drove 110 miles, each way, just to buy them. Roos are usually considered the best-looking, but...EE's have good-looking Hens.
Don't let ANYone talk you out of a project that you want to try. You may have the next "craze trend" bird, in your pics.