Olivgrün vs Webbing Green

How close are they?

ΔE 7.3, close: similar, with a visible difference side by side. Webbing Green is a little darker, more muted than Olivgrün.

Can I use Webbing Green instead of Olivgrün?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Webbing Green is a little darker, more muted than Olivgrün.

Can I use Olivgrün instead of Webbing Green?

The same difference applies the other way round: Olivgrün is a little lighter, more saturated.

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.