ΔE 11.5, fair: the same colour family, but not a straight swap. Monastic Green is more muted, cooler than Hulky Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Monastic Green is more muted, cooler than Hulky Green.
The same difference applies the other way round: Hulky Green is more saturated, warmer.
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 Hulky Green on the colour wheel See Monastic Green on the colour wheel
All matches: Hulky Green equivalents · Monastic Green equivalents