Nurgling Green vs Olive Green

How close are they?

ΔE 8.0, close: similar, with a visible difference side by side. Olive Green is a little darker than Nurgling Green.

Can I use Olive Green instead of Nurgling Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Olive Green is a little darker than Nurgling Green.

Can I use Nurgling Green instead of Olive Green?

The same difference applies the other way round: Nurgling Green is a little lighter.

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.