Quote:
Since Buff Columbians are not actually "buff," but just golden columbians, no, blue does not dilute them. However, it does dilute true Buff. Lavender does indeed dilute gold to an "Isabel" color, but remember that it is recessive.
On a discussion at The-Coop, threre were a fair number of comments that blue can provide a variable amount of of dilution to gold. Does not always, and certainly not to the extent of lavender or other gold diluting genes. However, what I find odd on hte bird in question is that the hackles are barely diluted, whereas the body is very diluted. It almost looks photoshopped. The 2nd bird posted also has darker hackles, although they appear to mostly blue, whereas the bird shown in the first post has both blue and gold in the hackles.