The only thing that I see that really bugs me is her chest. Actually, a lot of artists do this, and it's kinda sorta a pet peeve of mine. If that blue on her chest id supposed to be part of the robe, it should stretch across her breasts. The was you have it drawn is as it they are her breasts themselves. If they are, then they're the wrong color blue. Cloth does not meld to the breasts, it stretches over them.
It's definitely not her skin. I was confused by it too when I first noticed the chest area is a different shade of blue than her own skin. I think it's just Blizzard's re-coloring of S3 from T6 gone screwy.