ΔE 10.1, fair: the same colour family, but not a straight swap. Black Green is a little darker, more saturated than Dark Neutral Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Black Green is a little darker, more saturated than Dark Neutral Grey.
The same difference applies the other way round: Dark Neutral Grey is a little lighter, more muted.
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 Dark Neutral Grey on the colour wheel See Black Green on the colour wheel
All matches: Dark Neutral Grey equivalents · Black Green equivalents