No, seriously, it's impossible to accurately convey. You can talk about the mechanics, the use cases, what you can do with it, but you cannot convey "how it is", same as a bat cannot convey "how sonar is".
Only good answer, really - can only answer in the terms of other senses, however, since colour is meaningless too: "It's like being able to hear the texture of things, even at a great distance."
It really is, which is why I find videos like "Kids explain color to blind people" (which is an actual video that exists btw, it's the dumbest thing I've ever seen out of a clickbaity video trying to be smart, and one kid is even like "so you know what an apple looks like right?" or something) so dumb.