RAF Camouflage (Barley) Grey BS381C/626 vs Grey Seer

How close are they?

ΔE 6.9, close: similar, with a visible difference side by side. Grey Seer is a little lighter than RAF Camouflage (Barley) Grey BS381C/626.

Can I use Grey Seer instead of RAF Camouflage (Barley) Grey BS381C/626?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Grey Seer is a little lighter than RAF Camouflage (Barley) Grey BS381C/626.

Can I use RAF Camouflage (Barley) Grey BS381C/626 instead of Grey Seer?

The same difference applies the other way round: RAF Camouflage (Barley) Grey BS381C/626 is a little darker.

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.