ΔE 13.6, fair: the same colour family, but not a straight swap. Park Green Flat is a little lighter, more saturated, warmer than Dark Jade.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Park Green Flat is a little lighter, more saturated, warmer than Dark Jade.
The same difference applies the other way round: Dark Jade 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 Dark Jade on the colour wheel See Park Green Flat on the colour wheel
All matches: Dark Jade equivalents · Park Green Flat equivalents