RAL 6003 Olivgrün opt.2 vs US Dark Green

How close are they?

ΔE 4.3, very close: most people won’t see a difference side by side. US Dark Green is warmer than RAL 6003 Olivgrün opt.2.

Can I use US Dark Green instead of RAL 6003 Olivgrün opt.2?

Yes, for most jobs. Very close match (ΔE 4). US Dark Green is warmer than RAL 6003 Olivgrün opt.2.

Can I use RAL 6003 Olivgrün opt.2 instead of US Dark Green?

The same difference applies the other way round: RAL 6003 Olivgrün opt.2 is 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.