ΔE 12.3, fair: the same colour family, but not a straight swap. Light Aircraft Gray BS381C/627 is a little lighter, more muted, warmer than Dewpath.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Light Aircraft Gray BS381C/627 is a little lighter, more muted, warmer than Dewpath.
The same difference applies the other way round: Dewpath is a little darker, more saturated, 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 Dewpath on the colour wheel See Light Aircraft Gray BS381C/627 on the colour wheel
All matches: Dewpath equivalents · Light Aircraft Gray BS381C/627 equivalents