What I read was from a study years back where most folks reported either dreaming in colour most times or always, or else in black and white most times or always.
It has always been very clear to me that my experiences are perceived in colour. Whether my dreams, my lucid dreams, my past life recollections, or in meditation.
I was also very aware of a hostile presence in the one black and white dream, which has never been my norm.
This may have different meanings for different folks...but to me, when I always experience the spirit world in colour, anything black and white would seem foreign and/or superimposed.,,either someone else's memories or dreans, or someone else's ill intention.
Peace & blessings,
Bound by conventions, people tend to reach for what is easy.
Here we must be unafraid of what is difficult.
For all living beings in nature must unfold in their particular way
and become themselves despite all opposition.
-- Rainer Maria Rilke