Hello! It would have been interesting to see a before and after with the contrast add, because this looks really sharp but might possibly have a bit too much contrast added. Nevertheless I love the bold vibrancy of the sky, and the fact that it doesn't appear noisy, grainy or over-saturated. So nice work there.
The mountains, since you asked, appear almost black on my monitor. But they are undoubtedly a different shade to the grass in the foreground, a lighter grey perhaps. I can see a few silhouettes of blades of grass against them but not much more. The sun rays show really well against them which make this quite a nice 'bursting' shot