ΔE 14.9, fair: the same colour family, but not a straight swap. Lupercal Green is noticeably darker, cooler than Olive Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Lupercal Green is noticeably darker, cooler than Olive Green.
The same difference applies the other way round: Olive Green is noticeably lighter, 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 Olive Green on the colour wheel See Lupercal Green on the colour wheel
All matches: Olive Green equivalents · Lupercal Green equivalents