This is a greeting mode and requires a good deal of energy for them to generate. They will generate an almost blinding flash of light when executing this form of communication. Invariably, they will fade after this into a more normal form of illumination. Sometimes, an individual spirit will be so excited in generating the greeting that they will appear almost as if they were exploding in a blinding flash, but it is in fact, a controlled phenomena. The rarest seem to be gold, deep purple and multicolored.
Colors have very specific signficance.
Originally, it was thought colors always or generally reflected the mood of the spirit, but this appears to not always be the case. This is very deceptive, because they are literally inter-diminsional and perspective can be easily misread. Bear in mind, that their size DOES NOT relate in proportion to objects in our world which they appear in proximity to. As varied as it was in life. Many Colonial spirits are quite playful and rowdy.