RAL 6007 Grün vs Dark Green

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Dark Green is a little darker, cooler than RAL 6007 Grün.

Can I use Dark Green instead of RAL 6007 Grün?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Dark Green is a little darker, cooler than RAL 6007 Grün.

Can I use RAL 6007 Grün instead of Dark Green?

The same difference applies the other way round: RAL 6007 Grün is a little lighter, 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.