Mid Soviet Khaki vs Olive Drab

How close are they?

ΔE 6.7, close: similar, with a visible difference side by side. Olive Drab is a little darker, more saturated than Mid Soviet Khaki.

Can I use Olive Drab instead of Mid Soviet Khaki?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Olive Drab is a little darker, more saturated than Mid Soviet Khaki.

Can I use Mid Soviet Khaki instead of Olive Drab?

The same difference applies the other way round: Mid Soviet Khaki is a little lighter, more muted.

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.