ΔE 14.5, fair: the same colour family, but not a straight swap. British Camo Green is much more muted than Resedagrün (RAL 6011).
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). British Camo Green is much more muted than Resedagrün (RAL 6011).
The same difference applies the other way round: Resedagrün (RAL 6011) is much 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.
See Resedagrün (RAL 6011) on the colour wheel See British Camo Green on the colour wheel
All matches: Resedagrün (RAL 6011) equivalents · British Camo Green equivalents