Color of the sky

What is the color of the sky? I shot this picture while traveling in Tibet, on route 318 - which is famous in China as one of the most scenic rich route that starts from Shanghai all the way to Lhasa, Tibet. This is the section perhaps 2-3 days before arriving Lhasa.
Why this color? And why not? Our eye perceives the color and interpreted with our inner vision, and thanks for the digital capture, sometimes we are able to present the picture in a somewhat false way but more realistic than otherwise a faithful reproduction, but is faithful reproduction is faithful? Because we don't see the picture with our eyes, we see the picture with our mind. A picture without a soul is a boring image. Taken using a Hasselblad H3D39 camera, with HC 300/4.5 lens.