Mid Feldgrau vs Dark Emerald

How close are they?

ΔE 11.9, fair: the same colour family, but not a straight swap. Dark Emerald is a little darker, cooler than Mid Feldgrau.

Can I use Dark Emerald instead of Mid Feldgrau?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Dark Emerald is a little darker, cooler than Mid Feldgrau.

Can I use Mid Feldgrau instead of Dark Emerald?

The same difference applies the other way round: Mid Feldgrau is a little lighter, 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.