ΔE 13.9, fair: the same colour family, but not a straight swap. Foul Green is noticeably lighter, more saturated than Bright Jade.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Foul Green is noticeably lighter, more saturated than Bright Jade.
The same difference applies the other way round: Bright Jade is noticeably darker, more muted.
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 Bright Jade on the colour wheel See Foul Green on the colour wheel
All matches: Bright Jade equivalents · Foul Green equivalents