I think you've captured an excellent scene here. The composition is excellent.
I like the blue effect overall. But I think the image could use more contrast. Taking it into PS, I see that the black levels in the photograph are not at the end of the scale, as they should be. In addition, due to oversharpening, or due to using too big of a radius while sharpening, there are halos along the treeline.
Finally, the image has a bit of noise. Noise reduction, e.g., via Neatimage, would have addressed that easily.
All in all, a beautiful image, just needs a bit of attention in an image editor like PS!
Great color, creates the mood. The tittle is well selected. I wonder if the photo would look better if you lower down and so the tree would have the sky background.
It is indeed blue mist. Seems a little bright to me, would have liked some colors to actually dip into the pure black, and this would have brought in the sky a little more. Nice Pic.