Clarification: Single and double coats are both acceptable as long as they are not hard, long, or woolly. Guard hairs (when present) may be a little longer. The coat on the left is short and soft. The coat on the right is long and harsh.
Clarification: Fawn for the Pug is from apricot to silver and all shades between. The coat may, or may not, include black guard hairs. Smuttiness is when the coat has an overlay of black over the fawn. This usually does not cover the entire dog and sometimes it looks like a blanket over the back. There may also be darker coloring on the legs. Smuttiness is a fault not a disqualification.
A black Pug is just that - Black. Sometimes you will see a Pug with a red cast to their coat. This is usually due to sunburn and is not a disqualification.
Undesirable: Fawn: smuttiness; indistinctive colors; a 'bleeding' of the black areas into the fawn; broad saddles; white spots. Black: grey or rusty cast; white spots. Pugs should be judged with no preference for either fawn or black coat color. If the silhouettes are correct, the black Pug's outline is an advantage over the fawn's. If the silhouettes are equally faulty, the black will appear faulty to a greater degree. The black color also gives the optical illusion of finer bone, less substance, and smaller size. For this reason the judge must give particular attention to the black's head and substance to ascertain that all necessary quality are present and are not overlooked. A few white hairs found on the chest of either fawn or black are permissible on an otherwise excellent speciman. As both colors age they may develop frosting on the muzzle. This should not be penalized.