Tundra Taupe vs Olive Drab (USAF)

How close are they?

ΔE 7.4, close: similar, with a visible difference side by side. Olive Drab (USAF) is a little lighter, more saturated, cooler than Tundra Taupe.

Can I use Olive Drab (USAF) instead of Tundra Taupe?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Olive Drab (USAF) is a little lighter, more saturated, cooler than Tundra Taupe.

Can I use Tundra Taupe instead of Olive Drab (USAF)?

The same difference applies the other way round: Tundra Taupe is a little darker, more muted, 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.