Mid Feldgrau vs Olive Green RLM80

How close are they?

ΔE 7.0, close: similar, with a visible difference side by side. Olive Green RLM80 is a little darker, warmer than Mid Feldgrau.

Can I use Olive Green RLM80 instead of Mid Feldgrau?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Olive Green RLM80 is a little darker, warmer than Mid Feldgrau.

Can I use Mid Feldgrau instead of Olive Green RLM80?

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