Reading you has reminded me of what I have seen happening with my clients. I have been working with people using perfumery as an artistic medium, and yes, each scent is like a colour…and people quite easily use them when they have someone who can create a safe space. In my experience scents and colours are a language, that we can speak although many times we are not aware of it.
I have seen people creating perfumes that reminded of summer nights, or forests, or any personal moment, without knowing the meaning of each “colour” they used. There is really something deep in us that know how to express itself, if we allow him/her.