ΔE 11.5, fair: the same colour family, but not a straight swap. Spring Green is a little lighter, more muted than Leafy Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Spring Green is a little lighter, more muted than Leafy Green.
The same difference applies the other way round: Leafy Green is a little darker, more saturated.
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 Leafy Green on the colour wheel See Spring Green on the colour wheel
All matches: Leafy Green equivalents · Spring Green equivalents