Gray is the transition between white and black making it a neutral and unemotional color. As gray gets closer to black it becomes more dramatic and mysterious. The closer gray gets to silver and white the more lively and illuminating it becomes.
Gray does not tend to stimulate or excite because it is quiet and reserved. Lighter grays can have a soothing and calming effect. Too much gray can cause sadness, however, it can also have a steadying effect on one's mood by balancing brighter colors and illuminating softer colors. Furthermore, gray often has elements of other colors that allow it to energize.