ΔE 5.5, very close: most people won’t see a difference side by side. Medium Grey Blue is a little lighter, warmer than Light Aircraft Gray BS381C/627.
Yes, for most jobs. Very close match (ΔE 6). Medium Grey Blue is a little lighter, warmer than Light Aircraft Gray BS381C/627.
The same difference applies the other way round: Light Aircraft Gray BS381C/627 is a little darker, cooler.
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 Light Aircraft Gray BS381C/627 on the colour wheel See Medium Grey Blue on the colour wheel
All matches: Light Aircraft Gray BS381C/627 equivalents · Medium Grey Blue equivalents