Aircraft Gray Green BS283 vs Green Sky

How close are they?

ΔE 8.2, close: similar, with a visible difference side by side. Green Sky is a little lighter, more saturated than Aircraft Gray Green BS283.

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

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Green Sky is a little lighter, more saturated than Aircraft Gray Green BS283.

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

The same difference applies the other way round: Aircraft Gray Green BS283 is a little darker, more muted.

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.