The tree has reached maturity and has overcome the darkness… it must now ‘plant seeds for the future.'”
The color black is created when all the colors of the light spectrum have been absorbed into an object. That object has “taken control” of the colors and retained them. If one color was to “escape”, the object would no longer be black but would appear as that color. The student has mastered the nine geup (grades) of Taekwon-Do. He/she has “absorbed” all the knowledge of the color ranks and overcome or “mastered” that level or training.
The colors of the spectrum are bound together and are not reflected off an object, resulting in the absence of color which we call Black.