ΔE 14.1, fair: the same colour family, but not a straight swap. Light Gray is a little darker, more muted, cooler than Terminatus Stone.
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, cooler than Terminatus Stone.
The same difference applies the other way round: Terminatus Stone is a little lighter, 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 Terminatus Stone on the colour wheel See Light Gray on the colour wheel
All matches: Terminatus Stone equivalents · Light Gray equivalents