this will help you
Yellow: joy, freedom, non-attachment, freeing or releasing vital forces. People who glow yellow are full of inner joy, very generous and not attached to anything. Yellow halo around the head: high spiritual development. A signature of a spiritual teacher. Do not accept spiritual teachings from anyone who does not have such a yellow halo. Buddha and Christ had yellow halos extending to their arms. Today it is rare on Earth to find a person with a halo larger than 1 inch. Yellow halo appears as a result of a highly active brow chakra (which can be seen glowing with violet by many people at my workshops). Highly spiritual people stimulate the brow chakra continuously for many years, because they always have intensive spiritual thoughts in their minds. When this chakra is observed when highly active, a yellow (Auric pair) halo appears around it, surrounding the entire head. Yellow thought indicates a moment of joy and contentment.