ΔE 10.8, fair: the same colour family, but not a straight swap. Commando Green is a little lighter, more saturated than Deep Black.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Commando Green is a little lighter, more saturated than Deep Black.
The same difference applies the other way round: Deep Black is a little darker, 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 Deep Black on the colour wheel See Commando Green on the colour wheel
All matches: Deep Black equivalents · Commando Green equivalents