Emerald green is one of those colors that can come in a variety of shades and tones. It can be bright and light or dark and vivid. It can have a hint of blue making it seem a cool color or hints of yellow making it feel warm. 

Today look for an array of greens that seem in harmony with one another! 

I found the most harmonious display of emeralds and green by sheer accident at the Swarovski crystal store.