Aphantasia is really annoying to explain to people, like trying to explain blindness to a person who's always seen. I can't "see" anything, but I'm able to reason about it and kinda trace what I imagine with my eyes.

Interestingly enough, I have very lucid dreams and have realized that I am able to visualize (with color!) inside of them. I can't imagine being able to do that at will while awake, must be amazing.