Hydra Turquoise vs Light Aircraft Gray BS381C/627

How close are they?

ΔE 14.2, fair: the same colour family, but not a straight swap. Light Aircraft Gray BS381C/627 is much more muted, warmer than Hydra Turquoise.

Can I use Light Aircraft Gray BS381C/627 instead of Hydra Turquoise?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Light Aircraft Gray BS381C/627 is much more muted, warmer than Hydra Turquoise.

Can I use Hydra Turquoise instead of Light Aircraft Gray BS381C/627?

The same difference applies the other way round: Hydra Turquoise is much 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.