Check out this very informative article by accomplished landscape photographer Ramtin Kazemi.
Color Theory is such an important part of art, and it's evident that the very best landscape photographers have taken the time to learn this!
Ramtin leads epic workshops in the rugged Canadian Yukon for Adventure Photo Canada, and in my opinion is one of the very best in the business!
http://www.ramtinkazemi.com/articles/2017/1/8/landscape-photography-reality-vs-photographs
500px: https://500px.com/ramtinkazemi
instagram: https://www.instagram.com/ramtin.kazemi.photography/