Death Korps Drab vs Olive Drab

How close are they?

ΔE 6.2, close: similar, with a visible difference side by side. Olive Drab is cooler than Death Korps Drab.

Can I use Olive Drab instead of Death Korps Drab?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Olive Drab is cooler than Death Korps Drab.

Can I use Death Korps Drab instead of Olive Drab?

The same difference applies the other way round: Death Korps Drab is 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.