Field Green FS 34097 vs Nurgling Green

How close are they?

ΔE 11.7, fair: the same colour family, but not a straight swap. Nurgling Green is noticeably lighter, cooler than Field Green FS 34097.

Can I use Nurgling Green instead of Field Green FS 34097?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Nurgling Green is noticeably lighter, cooler than Field Green FS 34097.

Can I use Field Green FS 34097 instead of Nurgling Green?

The same difference applies the other way round: Field Green FS 34097 is noticeably darker, 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.