ΔE 4.4, very close: most people won’t see a difference side by side. USAF Light Gray is a little lighter than RAF Light Aircraft Grey BS381C/627.
Yes, for most jobs. Very close match (ΔE 4). USAF Light Gray is a little lighter than RAF Light Aircraft Grey BS381C/627.
The same difference applies the other way round: RAF Light Aircraft Grey BS381C/627 is a little darker.
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 RAF Light Aircraft Grey BS381C/627 on the colour wheel See USAF Light Gray on the colour wheel
All matches: RAF Light Aircraft Grey BS381C/627 equivalents · USAF Light Gray equivalents