RAF Extra Dark Sea Grey BS381C/640 vs Dark Sea Gray

How close are they?

ΔE 3.7, very close: most people won’t see a difference side by side. Dark Sea Gray is a little darker than RAF Extra Dark Sea Grey BS381C/640.

Can I use Dark Sea Gray instead of RAF Extra Dark Sea Grey BS381C/640?

Yes, for most jobs. Very close match (ΔE 4). Dark Sea Gray is a little darker than RAF Extra Dark Sea Grey BS381C/640.

Can I use RAF Extra Dark Sea Grey BS381C/640 instead of Dark Sea Gray?

The same difference applies the other way round: RAF Extra Dark Sea Grey BS381C/640 is a little lighter.

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.