Hello, OPforum.net I would like to re-create an older idea in a simple format. The idea is, Haki is a made-up word which is based on the idea of chakra energy. Chakra energy is, "Life Essence". It is the vibrational energy; electromagnetic energy; which all forms of life possess. (Biomagnetism is the phenomenon of magnetic fields produced by living organisms; it is a subset of bio electromagnetism.). It is photonic energy, light. That is to say, in this story, people who are able to use this energy are actually an evolved form of creature; things which can create and use photonic energy through their own physiology. However, this is based on the idea of a "Soul". This is why the phrase often goes hand-in-hand with, "Willpower.". The colors themselves are based on the light spectrum. But, they do go in a specific ordering. They can be described as follows: 1. Red: Root Chakra 2. Orange: Sacral Chakra 3. Yellow: Solar Plexus Chakra 4. Green: Heart Chakra 5. Blue: Throat Chakra 6. Indigo: Third Eye Chakra 7. Violet: Crown Chakra I'll continue to think of more to add, however I believe this covers the general understanding of the subject. This is slightly open to interpretation where it concerns how each category applies itself. Then, too, how I see where it applies might not be the same as how someone else might. As a final note, it would seem clear that Crown Chakra is King's Haki.