ΔE 11.0, fair: the same colour family, but not a straight swap. USAAF Light Gray is a little darker, cooler than Mojave White.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). USAAF Light Gray is a little darker, cooler than Mojave White.
The same difference applies the other way round: Mojave White is a little lighter, 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 Mojave White on the colour wheel See USAAF Light Gray on the colour wheel
All matches: Mojave White equivalents · USAAF Light Gray equivalents