ΔE 10.3, fair: the same colour family, but not a straight swap. Death World Forest is more saturated, cooler than RAL 6003 Olivgrün opt.1.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Death World Forest is more saturated, cooler than RAL 6003 Olivgrün opt.1.
The same difference applies the other way round: RAL 6003 Olivgrün opt.1 is 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.
See RAL 6003 Olivgrün opt.1 on the colour wheel See Death World Forest on the colour wheel
All matches: RAL 6003 Olivgrün opt.1 equivalents · Death World Forest equivalents