ΔE 10.6, fair: the same colour family, but not a straight swap. Army Green is a little darker, more muted than Canopy Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Army Green is a little darker, more muted than Canopy Green.
The same difference applies the other way round: Canopy Green is a little lighter, 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 Canopy Green on the colour wheel See Army Green on the colour wheel
All matches: Canopy Green equivalents · Army Green equivalents