Deep Grey vs Greatcoat Grey

How close are they?

ΔE 4.2, very close: most people won’t see a difference side by side. Greatcoat Grey is a little darker, cooler than Deep Grey.

Can I use Greatcoat Grey instead of Deep Grey?

Yes, for most jobs. Very close match (ΔE 4). Greatcoat Grey is a little darker, cooler than Deep Grey.

Can I use Deep Grey instead of Greatcoat Grey?

The same difference applies the other way round: Deep Grey is a little lighter, warmer.

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.