Do you know? dust actually not black colour, but is some kind of gray, so unless your "black" wall is using gross finish paint, if not when the dust stop on the wall, it will look very bad

In fact, choosing feature wall color, for me, most of the time, i need to see the whole concept of your house design, then only can give you an ideal of color matching. Example, red is nice, but who know your furniture and other wall is using yellow or brown base color, when meet red, that will be a bit funny i think. So all the color is nice just depent match or not.

I think darker gray will be nicer