ΔE 10.1, fair: the same colour family, but not a straight swap. Nurgling Green is a little lighter than Russian Uniform Lights.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Nurgling Green is a little lighter than Russian Uniform Lights.
The same difference applies the other way round: Russian Uniform Lights is a little darker.
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 Russian Uniform Lights on the colour wheel See Nurgling Green on the colour wheel
All matches: Russian Uniform Lights equivalents · Nurgling Green equivalents