Third palette looks a little flat, I think there might not be enough contrast in the purple.
Anyway:
http://yinlunghuang.deviantart.com/art/Nox-Libarian-of-Shadows-95144723
I agree. ;P I'd go as so far to say that the blue doesn't have quite enough contrast either; there's just so much in the white's palette that it seems like a more obvious issue than it really is.
As for this newest sprite; I don't get why you're not using pure black. You're basically using it, so why not? I know you run into issues with transparency, but that doesn't ever stop game companies from using it themselves. I'd also say that using that much of the darkest black for the dress makes her lower body look flat, since you don't do that anywhere else. I think it can be a really effective shading method if you're consistent with it, but right now, it just draws your attention right to her lower body.
I think her face is kind too round/chubby as well. Especially compared to the referenced art, where the face to hair ratio is different. Granted, it is your character.
And speaking of the hair, you might want to add more contrast to the browns; the highlights are pretty tame (second to lightest shade might as well not be there).
I also don't really like the effect in her hand... I think you've got too many colors in there, and the palette is pretty close to her own. I would put fewer shades in there, and make it a bit more spastic looking. Since it isn't animated, for it to be effective, I think I should be able to look and it and see it move in my head. It looks too compact with detail that I can't see it happening; it isn't dynamic enough.
For the shoulders, I think the highlights would be better on the rim/edges of her decorations. That would define the lines and shapes there a bit better. The art defined them as having sides, and I think the sprite gives them more of a cone impression.
I'm not sure if that's the most effective way to pixel HER right hand either... that's really something that could just be played with.
And in general, I think you made her clothes look kind of thick; that issue really shows up in the collar.
Now the sprite you posted before this one, the one where the girl is laying down, I like that one a lot. The expression is nice, and I really dig the form of the upper body. I don't so much like the dress though. I would recommend looking at some Renaissance paintings, because I know that there's tons of poses similar to that one floating around (as to if they're wearing a dress, I dunno). In general though, I don't think there's enough folds going on; I don't get the idea of depth and shadow like I do when I look at the rest of her body.
I think my favorite part of this one is the flow of the hair; it works great with the highlights too.
I feel all nostalgic posting up a wall of crit.
You outta post some animations ya know; you've been doing these single poses for these ladies for quite a while now!