How was the twilight blue color effect in this photo produced

I really wonder, when I see some people showing their creativity, composition sense, and light sense through their photographs. I just came through such a photo now. This is the photo: I saw this

Twilight Colors In Arizona poster by Alan Dyer. Our posters are produced on acid-free papers using archival inks to guarantee that they last a

Twilight Colors In Arizona Poster

effect - What was done to this photo to get a surreal tone of pastel-like purples and blues? - Photography Stack Exchange

photo editing - How to achieve matte effect? - Photography Stack Exchange

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color - A photo effect that favours yellow & blue; What is its name & how is it done with GIMP? - Photography Stack Exchange

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color - A photo effect that favours yellow & blue; What is its name & how is it done with GIMP? - Photography Stack Exchange

photo editing - Old photography effect in Photoshop - Photography Stack Exchange

Chalky Chicks Premium Chalk Style Paint for Furniture, Home Decor & DIY Crafts – Eco Friendly – No Sanding, No Primer Needed – Multi Surface Paint – Twilight (Teal Blue) – 32

color - A photo effect that favours yellow & blue; What is its name & how is it done with GIMP? - Photography Stack Exchange

effect - What filter was used on this photo? - Photography Stack Exchange

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