Green is the color which stimulates the aura and necessary for revival of spirits. Its the color of nature or it is can be said that nature has been drawn preferentially using Green color. In the subtractive color system, it is not a primary color, but is created out with a mixture of yellow and blue it is considered as the combination of two primary colors, whatever nature is uncompleted without green color. You can believe the statement by viewing the photos of beautiful green nature. Have a glance.