Mid Feldgrau vs Dark Green (Luftwaffe)

How close are they?

ΔE 8.1, close: similar, with a visible difference side by side. Dark Green (Luftwaffe) is more saturated, warmer than Mid Feldgrau.

Can I use Dark Green (Luftwaffe) instead of Mid Feldgrau?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Dark Green (Luftwaffe) is more saturated, warmer than Mid Feldgrau.

Can I use Mid Feldgrau instead of Dark Green (Luftwaffe)?

The same difference applies the other way round: Mid Feldgrau is more muted, cooler.

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.