PLEASE NOTE: the interpretations discussed cover colors seen while meditating and in a near meditative state, as well as the colors of auras projected by individuals in the form of halos and such. I looked at different definitions, and these seem to be the best descriptive from my own personal experience (I am aware that other definitions are possible, and would appreciate others to give their own GENUINE input, and not "hearsay" from others:)

My experience indicates red to define anger and a potential for revenge or retaliation of some kind, especially if involving a loved one or authority figures. I got written up for a bad nursing omission of care following a vision of a red "sparkle" (but then so did other nurses who made the same bad assumption with this same patient as I did. Maybe my clinical manager likes me for some weird reason). 

Orange seems to indicate fear and anger from similar outside or related persons, while yellow indicates feelings of fear and panic from such individuals (I noticed a lot of yellow flashes after I posted a horoscope analysis that looked at the possibility of war between Israel and Iran on this website).

Green is DEFINITELY illness or a declination in health, and lime green can be near fatal (especially if seen on the aura projected by someone). The color bar above defines green as "institutional," and involvement of hospitalization or the correctional system comes to mind.

Blue is DEFINITELY involvement with spiritual and "other-worldly" phenomena (i.e. UFO experience, ghosts, angel-like beings flying around, astral-projection). Deep electric blue may indicate a past life encounter or high level astral projection (I noticed that during an astral projection that high level beings appear to be made up of "neon-like" lineages of electric blue coloring and were moving slowly, like a slow-motion picture).

Purple can define sexual or ecstatic joy. I have seen (twice) purple-colored light beings lying next to me in bed that would eventually turn out to be sexual partners that I can trust (based on the body curvatures that I remembered from what I saw). I also sometimes see purple flashes from women interested in me (and sometimes from men) when I talk with such patrons in night clubs or bars, or when I make a really good joke.

White light is spiritual harmony or harmony with others at the highest level. This seems to be the "color" most people on this website refer to or try to seek, and ignore all other colors of light. My message to such people is this, at least from my experiences with light: you have to eat your vegetables before you can have your dessert.

Love to all, Malcolm