Setting the background color of the minibuffer

[Óscar Fuentes]

Is it possible to set the background color (the face, in general terms)
of the minibuffer (and only of the minibuffer) without using a dedicated
frame for it?

What I'm attempting is to set a black background for the minibuffer
while working in full-screen mode. This way the minibuffer looks like
part of the monitor's perimeter and not as an empty line at the bottom
of the screen.