ΔE 17.0, loose: different enough that you should pick on purpose. N3 Neutral Gray is a little lighter, much more muted than Incubi Darkness.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). N3 Neutral Gray is a little lighter, much more muted than Incubi Darkness.
The same difference applies the other way round: Incubi Darkness is a little darker, much more saturated.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Incubi Darkness on the colour wheel See N3 Neutral Gray on the colour wheel
All matches: Incubi Darkness equivalents · N3 Neutral Gray equivalents