ΔE 12.9, fair: the same colour family, but not a straight swap. Death Guard Green is more saturated, cooler than Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Death Guard Green is more saturated, cooler than Green.
The same difference applies the other way round: Green is more muted, 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 Green on the colour wheel See Death Guard Green on the colour wheel
All matches: Green equivalents · Death Guard Green equivalents