Aircraft Gray Green BS283 vs Pastel Green

How close are they?

ΔE 11.0, fair: the same colour family, but not a straight swap. Pastel Green is a little lighter, warmer than Aircraft Gray Green BS283.

Can I use Pastel Green instead of Aircraft Gray Green BS283?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Pastel Green is a little lighter, warmer than Aircraft Gray Green BS283.

Can I use Aircraft Gray Green BS283 instead of Pastel Green?

The same difference applies the other way round: Aircraft Gray Green BS283 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.