Wild-type (blue-breasted)
A variant of King quail (Synoicus chinensis)

Representative King quailphoto — a dedicated image of this exact morph isn't available yet.
The natural plumage: males show a slate-blue breast and flanks with a black-and-white throat bib, females are plainer brown. The baseline against which all mutations are judged.
Keeper tips for this variant
House on the ground with low overhead clearance and soft cover; startled birds 'boink' straight up and can concuss themselves on a hard cage roof.