RAL 6003 Olivgrün opt.1 vs Uniform Green

How close are they?

ΔE 7.5, close: similar, with a visible difference side by side. Uniform Green is more muted, cooler than RAL 6003 Olivgrün opt.1.

Can I use Uniform Green instead of RAL 6003 Olivgrün opt.1?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Uniform Green is more muted, cooler than RAL 6003 Olivgrün opt.1.

Can I use RAL 6003 Olivgrün opt.1 instead of Uniform Green?

The same difference applies the other way round: RAL 6003 Olivgrün opt.1 is more saturated, 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.