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