Death Korps Drab vs Olive Shadow

How close are they?

ΔE 16.1, loose: different enough that you should pick on purpose. Olive Shadow is noticeably darker, warmer than Death Korps Drab.

Can I use Olive Shadow instead of Death Korps Drab?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Olive Shadow is noticeably darker, warmer than Death Korps Drab.

Can I use Death Korps Drab instead of Olive Shadow?

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