Looking for cool shaders :p

I need some Minecraft shaders for a project I will be working on soon. However, I am going for a Viking/dwarven/Scandinavian theme and I want shaders that would compliment the style with more blue lighting as opposed to the bright almost yellow that I keep seeing.

An almost wintery feel in some extreme hills next to the sea is what I would want, I also want it to be misty if possible as that would look dope. Heres a reference picture: Kaer Trolde from The Witcher 3.

Wow. How can you even make your own shaders?