Nocturne Green vs Greatcoat Grey

How close are they?

ΔE 12.0, fair: the same colour family, but not a straight swap. Greatcoat Grey is a little lighter, more muted, warmer than Nocturne Green.

Can I use Greatcoat Grey instead of Nocturne Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Greatcoat Grey is a little lighter, more muted, warmer than Nocturne Green.

Can I use Nocturne Green instead of Greatcoat Grey?

The same difference applies the other way round: Nocturne Green is a little darker, more saturated, 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.