Nurgling Green vs Cockpit Green (IJN)

How close are they?

ΔE 12.3, fair: the same colour family, but not a straight swap. Cockpit Green (IJN) is more muted, cooler than Nurgling Green.

Can I use Cockpit Green (IJN) instead of Nurgling Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Cockpit Green (IJN) is more muted, cooler than Nurgling Green.

Can I use Nurgling Green instead of Cockpit Green (IJN)?

The same difference applies the other way round: Nurgling 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.