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