I have, and it is beautiful when that happens. I was not always sure what I was seeing, like I see it very strongly when I'm in nature (and feeling so connected to the trees), this pulsing, and movement, and I did not know that was my aura (unless I was in bed, then I knew), then I spoke to this experienced guy and he said it was probably my aura. I see crystal/white when I am in nature, and in bed, I have seen pink, violet and indigo, sometimes indigo on its own. So, from what I have seen, my own aura changes colour (but those colours I mentioned seem to be very persistent). The colours I am more strongly drawn to are indigo/violet, then pink (and sometimes the order swaps around).
I read in a book that indigo is referring to the colour of the soul of indigos.....sometimes (not always) it's the colour of the aura (in indigos).
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Here is an aura test:
Auracolors with Pamala Oslie - Aura Colors, Life Colors, Love Colors, Psychic, Clairvoyant - Personal Aura Colors Quiz
My top scores where crystal, indigo and blue, and indigo all with 10 points,
and violet and lavender, both with 9 points
and the rest all under 3.
I bought a big chevron Amethyst a few days ago, and placed it on my third eye and heart chakras at night (but mostly the third eye) and sometimes held it in my hand, and I noticed, I felt calmer, and also, what I was seeing, was calmer/smoother than usual, there was more peace in there air, it was stiller, my aura was stiller. Last night I saw a felt a few things, and I felt it was getting stronger, the energy in the room, I felt like I was going to get a visit, by something....then I felt fear and saw my aura moving more, it was not so calm......on went the light, for a little while. I have used Amethyst at night before, but not quite as big, and not chevron, and not while looking into the dark to see.....
So, well, it's just amazing to see my own aura and how it changes (and other unseen things....). And I'm interested in your experiences!