Out of everything listed, nothing would come out as hets. Everything you have on here is co-dominant, so that's why there aren't any hets(in the technical sense, all non super forms of codom animals are hets, but since they are visual mutations, they really aren't called hets).
I would look for a female Cinny to go with your Pastel YB for Pewter YBs and I would also put your Pastel YB in with your Fire.