ΔE 10.9, fair: the same colour family, but not a straight swap. Light Green is a little lighter, more muted, cooler than Guardian Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Light Green is a little lighter, more muted, cooler than Guardian Green.
The same difference applies the other way round: Guardian Green is a little darker, more saturated, 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 Guardian Green on the colour wheel See Light Green on the colour wheel
All matches: Guardian Green equivalents · Light Green equivalents