nope, that's my silver quail, totally unrelated
Dun is a chocolate looking color based on the dominate white gene.
It acts just like blue does to a bird. It covers the black feathers in a chocolate brown. Also like blue it can come in many shades, from pale smokey grey to dark brown to a dull black.
Also like blue, it doesnt breed true, it makes black, dun and khaki
Khaki is a bird that carries two copies of the dun gene, just like splash in blue has two copies of the blue gene.
IT IS NOT to be confused with true chocolate, that is a totally different gene seldom seen in the US, it is sex linked and recessive, but breeds true when both parents have a copy of it, unlike dun which does not.
For a dun quail
here's a pic
not the best, but note how the tail is not bright glossy black, same in the hackle and saddles
here's a dun quail hen, note no black at all on her
this is a solid dun hen
heres one of the lighter phased smokey dun males
now here's a khaki quail
this is a double dosed dun which makes the paler khaki color in the black areas.