ΔE 13.6, fair: the same colour family, but not a straight swap. Flat Green is a little lighter, much more saturated than Jungle Moss.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Flat Green is a little lighter, much more saturated than Jungle Moss.
The same difference applies the other way round: Jungle Moss is a little darker, much 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 Jungle Moss on the colour wheel See Flat Green on the colour wheel
All matches: Jungle Moss equivalents · Flat Green equivalents