I saw your post, and when I noticed how you mentioned that you feel it like a fog....
That's much similar in my case, for example, how I say that I cannot see it, or feel it as a matter of touch, but, that's kinda how it works for me, I feel it the way I described it, but I also feel it like it's in the atmosphere, like how you said 'a fog'.
How you mentioned the colors, for me, I feel the aura as a mood, or I describe it like a personality, that makes it easier for me to decide which color it is.
That's much similar in my case, for example, how I say that I cannot see it, or feel it as a matter of touch, but, that's kinda how it works for me, I feel it the way I described it, but I also feel it like it's in the atmosphere, like how you said 'a fog'.
How you mentioned the colors, for me, I feel the aura as a mood, or I describe it like a personality, that makes it easier for me to decide which color it is.