The color yellow is primarily seen as the warm color of the sun in art and photography. But yellow also has negative psychological and physiological connotations.

It's hard to find a color with a more positive connotation than green. We use green to decorate our homes and it plays a major role in city planning. And it doesn't end there. We are willing to leave the comfort of our cities and hike through wind and rain to high hills for views of endless greenery. Whether it is consciously or subconsciously, people like to surround themselves with green.