Forest Green is the color of the inner forest. So, it is within the system. Though each aspect is interesting and important on its own, we understand that its greater importance is its function within the system. Red is the color of blood and fire. Blood is for life.
Fire is for cleansing, illumination and passion.
Those who reach the red level will understand its meaning. In western culture, black is the color of mastery as well as void. Black may be thought of as the absence of all colors or the combination of all colors. Black denotes that one has mastered the ability to devoid one's self of limiting factors, and to transcend knowledge for understanding. Black tips designate increased mastery within a particular section.