Hi HummingMask....I hope I don't get too technical on this...to really simplify it...I learnt that one can have the same color which can hold different definitions because where the "color" comes from vibrates at a different frequency.
There are colours of the Soul... Colours from the Mind ...and our own basic level, Physicality....
When someone visualizes a colour, let's take for example....blue... I found out that when I'm more spiritually tuned into my Soul, the colours vibrate faster and even show brilliance...like when one sees snow glittering under a streetlamp...
If I simply visualize a colour within my mind, I found out that it's more...soft-hued or has a pastel-like quality....
Then there are colours which folks automatically keep thinking about because it's in their physical environment all around them.
When a certain colour....again, eg. Blue....would have the "Soul" frequency attached to it, for some reason, it held a different perspective or definition for me....
It was the same colour coming at me, let's say "telepathically", then my "mid-brain mind" would interpret the "Blue" colour differently....because its frequency would vibrate differently.
I came to eventually understand that at certain heights of "spiritual frequencies", certain colours would appear as well....like blue, gold, silver...and sometimes green....
Also, at these higher spiritual frequencies, because these certain colours would naturally emerge, they would get logged into my "memory banks".....so.....let's say I had experienced a spiritual frequency that involved "healing" (from a spiritual stand-point), all I had to later do was to surface the "memory" of the colours which had become associated.... then that would give me a boost to enable me to enter into a "healing mode"....
Not too many people know this...but "White" is not a colour....it's a tone.... it's not all the colours that are in "White"...it's that the tone "White" can change all the colours into shades or hues......so....yes....in way.....if we're to round it off, since "White" is a catalyst tone, it affects all colours....
When folks visualize "White", they are really visualizing a "tone"....which enables them to keep in a "neutral zone"....and with that, they can be a bit more grounded....
Even "tones" do not have the same definitions.... one can experience "white" from a spiritual frequency....but the moment they visualize "white" only for the mind and don't tap into that spiritual frequency brilliance, then "white" becomes like a pastel , almost dull thick tone....
Personally, I found that the more "translucent" the tone white is, the higher the frequency.
By experience, I immediately know when someone is visualizing either a tone or a colour from "memory due to experiences to the higher frequencies".....or when someone visualizes via their imagination, as they have never experienced the actual frequency that is attributed to the tone or colour.
So....in essence, it's really the type of "energy" that is behind the tone or colour that defines the perspective or definition.
There are a lot of details, but I pray I've shared some answers which could be of benefit.
Love, Shan
P.S. Oh, one more thing... sometimes folks can have different "colours" in the auras.... one must take into consideration that these folks might very well be "channellers" or "mediums" are different spiritual frequencies are plugging into them... BUT.... the beautiful phenomenon, is that everyone has their own "unique soul colour".... and when they this colour within, and surface....there's a type of "heat" all over their body... and in this manner, they can shield themselves from other colours which their energy fields may be susceptible to. These are what are called the "sacred colours".....meaning, there is at least one colour that is predominant to keep interiour balance in all aspects of one's life.