ΔE 11.9, fair: the same colour family, but not a straight swap. Jade Green is a little lighter, more saturated than Light Turquois (Phthalo).
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Jade Green is a little lighter, more saturated than Light Turquois (Phthalo).
The same difference applies the other way round: Light Turquois (Phthalo) is a little 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 Light Turquois (Phthalo) on the colour wheel See Jade Green on the colour wheel
All matches: Light Turquois (Phthalo) equivalents · Jade Green equivalents