I'm a clairvoyant and I see many "orbs" throughout my day in addition to multiple "energy fields".
Orbs can be white, blue, purple, red, and green (maybe other colours, but I haven't seen more). They're indicators of a spirit's presence, I find before a spirit actually assumes a fuller form in the aether they will show up as orbs (sometimes multiple orbs in a collection). Some think orbs are ionized prana or aether (which I don't know what that means, New Agers seem to like to try to give scientific terms to spiritual experiences), I disagree from my personal observations.
Energy fields look like a 2D overlap over your vision. There are three that I see (excluding auras): "Prana" (Looks like T.V. static), "Aether" (Looks like an indigo "mesh", spirits seem to manipulate it to form orbs and shades/forms), and an odd red hue that forms geometric shapes (this is seen when looking beyond "prana").
I take these terms from what I've read from other people's personal experiences and their classifications, I haven't classified the red hue one.
Could you please elaborate more on "rainbow dots", possibly draw a picture? I'd be more accurate in my classification.