ΔE 13.6, fair: the same colour family, but not a straight swap. Light Gray FS36495 is more muted, cooler than Grotesque Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Light Gray FS36495 is more muted, cooler than Grotesque Green.
The same difference applies the other way round: Grotesque Green is 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 Grotesque Green on the colour wheel See Light Gray FS36495 on the colour wheel
All matches: Grotesque Green equivalents · Light Gray FS36495 equivalents