I know this was a dream, and as such, the Dreamer is the one the message is crafted for. Your own Higher Self gives you a Dream which can be similar to viewing a play or a movie, but you are in fact writing it as well as viewing it, as each piece of the Dream fits together like a jigsaw puzzle, and the conclusion is often not thought of by the Dreamer until he/she is surprised by it.
When I think of white and dark, I think of polarity, the yin/yang, and therefore the Dream carries a message about balance. Finding balance.
When we see Vision, we do not see long, played-out storylines, but just see something quickly, before it fades. I recently saw a Vision (while in hypnagogic sleep/dozing) of 2 Blue Beings, the kind that are the subject of Krshna and that whole ideology. The blue of their skin was a deep Blue, not light and pearly.
View attachment 11368
Imagine this being the skin colour of a whole person!
Well, I don't know too much about these beings, except that they have appeared to mankind before and created mythologies, experiences, etc. They could be 3D beings that actually visit. A current Youtuber called Nicole Frolick says her starseed is from a race of blue beings from a galaxy far, far away.
I tend to think Blue and Green are the colours of this Earth dimension - as well as White, as our planet is seen as a glowing jewel of blue and white from a distance.
So I feel there is something very visceral and 3D about the Dreamer's message to himself - something about our world as we know it, and balance which is needed in this out-of-balance world. I see the portals as being the arteries and veins within his own body, carrying his life force around to places where it is needed.
As with all good mysteries, there is fear of a possible negative imposition that can change/ WILL change what is experienced today into what will be experienced in the nameless "future" space. This again, I just see as imbalance. Once balance is achieved, fear of the future is gone. Nothing to fear. All is good.