ΔE 14.0, fair: the same colour family, but not a straight swap. Monastic Green is noticeably darker, more saturated than Burnt Moss.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Monastic Green is noticeably darker, more saturated than Burnt Moss.
The same difference applies the other way round: Burnt Moss is noticeably 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 Burnt Moss on the colour wheel See Monastic Green on the colour wheel
All matches: Burnt Moss equivalents · Monastic Green equivalents