ΔE 13.0, fair: the same colour family, but not a straight swap. Dawnstone is noticeably lighter, more muted than French Army Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Dawnstone is noticeably lighter, more muted than French Army Green.
The same difference applies the other way round: French Army Green is noticeably darker, 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 French Army Green on the colour wheel See Dawnstone on the colour wheel
All matches: French Army Green equivalents · Dawnstone equivalents