Hi @velimir.
I will add a subtitle to the pic.
A picture is worth 1000 words, but how many emotions?‬

it was sunset or dusk, would it be light-cyan as it is?

Yeah even as much as the sky is cyan in colour, a part of the top left has a bit of the sunset vibe in it too. So that makes it even harder to determine if it was actually sunset or dark. The image sure evokes a feeling of warmth while very cold.
That image is really wonderful. A really great image is one that conveys a mood and pulls the viewer into the scene. If a photo tells a story and tugs at the heartstrings, it’s successful. Of course, feelings and emotion are subjective, and each of us may feel differently when we look at a particular image, but i am sure i had same feeling and vibe as you had from the picture. Kudos.
Have a good day.