Bitsa. Bits of this and that. The father is probably my MIL's Americauna x buff orpington (looks black tailed buff with some Colombian markings). The mothers....her Colombian wyandotte crossed with him can pop spangles and/or lacing according to kippenjungle. So could her silver laced...who she swears went missing before the eggs started going in the incubator. We aren't really sure which hen laid the eggs as they were some of her brown ones.
If you're going to try breeding, maybe a buff Brahma (or similar colors) with the colombian/silver laced colors wyandotte, Delaware, polish, light brahma....see what you get and go from there