Merm Green vs Fern Green

How close are they?

ΔE 7.1, close: similar, with a visible difference side by side. Fern Green is more saturated, cooler than Merm Green.

Can I use Fern Green instead of Merm Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Fern Green is more saturated, cooler than Merm Green.

Can I use Merm Green instead of Fern Green?

The same difference applies the other way round: Merm 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.