There're 2 popular Lab grown Emerald Green Color Gemstones,One is Zambia Green, another is Colombia Green color.
Emerald appearance is sometimes associated with its mine location. Colombian emeralds are said to have a warmer and more intense pure green color. Zambian emeralds are said to have a cooler, more bluish green color. Generally, Zambian emeralds are deep green with slight bluish overtone.
More colors are available: