I have to say that a buff barred columbian bird with a crest that lays a green egg sounds like a very nice (and pretty) bird. I would love to see a picture if you have access to any.Yes. There is Gold. My understanding is that the "correct" genetics for CLs should be homozygous for gold ( s+/s+) and cream dilution (ig/ig). They shouldn't have any Silver (S).
BTW, this means that if you cross CLs with anything without cream, the gold should come through as undiluted gold. Thus, you can use your CL roos in gold (red) sex-link crosses. (For example, if you only have a small number of CL hens). In the UK some people have used Light-Sussex hens in this cross. I've been experimenting with CL x Delaware crosses. The sex-linking works fairly well, although the red/gold tinge can be fairly light. So far all 3 of the females I have hatched also had black head spots (not one, usually two), but with the small sample, I'm not if this will continue to hold (or if it might be a peculularity of my hen's genetics).
Although none of my CL x Del crosses are very old (and I've sold all the females), the females should grow out to be buff barred columbian birds with crests (assuming a roo homozygous for crest), and the males should look more-or-less like a Delaware with a crest (and greenish legs). Females should lay green eggs (brown+blue), and roosters should be hetrozygous for both brown and blue egg genes, so the egg color of their offspring would depend heavily on the egg color genetics of the hens they are bred with. Also my males seem to grow pretty quickly (so far). The first one that hatched I've started calling "monster."