Green is life. Abundant in nature, green signifies growth, renewal, health, and environment. On the flip side, green is jealousy or envy (green-eyed monster) and inexperience.
Green is a restful color with some of the same calming attributes of blue. Like blue, time moves faster in a green room.
Green is the national color of Ireland and is strongly associated with that country. Green also has close associations with Islam. Because of all the green in nature the color is reminiscent of Spring. Coupled with red it's a Christmas color.
With both a warming and cooling effect, the color green denotes balance, harmony, and stability. Use several shades of green for a fresh, Springtime feel. Olive green, also called olive drab, is a not so drab summery green that may have military overtones for some people.