In art "absolute blacks" do not exist even though recently a military laboratory has gone near by patenting the "Vantablack", carbon nanotubes, which absorb 96.6% of visible light ... whose use in art modern will create three-dimensional effects. ..
On the use of
dark shades in painting;
A historical example for all: Caravaggio in his "Vocation of St.
Matthew" amazes us how to use "light" and "shadows" creating wonderful effects and sensations ...
Someone claimed that "only looking deeply into the darkness you can see what you want" ... !!