ΔE 11.2, fair: the same colour family, but not a straight swap. Gunship Green is a little lighter, more saturated, warmer than Riff Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Gunship Green is a little lighter, more saturated, warmer than Riff Green.
The same difference applies the other way round: Riff Green is a little darker, more muted, 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.
See Riff Green on the colour wheel See Gunship Green on the colour wheel
All matches: Riff Green equivalents · Gunship Green equivalents