ΔE 10.4, fair: the same colour family, but not a straight swap. Jade Green is a little darker, cooler than Foul Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Jade Green is a little darker, cooler than Foul Green.
The same difference applies the other way round: Foul Green is a little 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 Foul Green on the colour wheel See Jade Green on the colour wheel
All matches: Foul Green equivalents · Jade Green equivalents