Emerald is the color of the year chosen by Pantone, "Emerald, a vivid verdant green, enhances our sense of well-being further by inspiring insight as well as promoting balance and harmony."
It is the color of renewal. When I was studying, it is a color recommended for city apartments because it is the neutral color in nature, often in cities you look out to buildings, to have green inside is relaxing. It is also the easiest color on your eyes. It is refreshing.
Emeralds being gems refract and reflect light so you will have many variations and depths of the color
It works well with blues and is the color of May. Will we see many green interiors this year?