Greatcoat Grey vs Faded P.R.U. Blue

How close are they?

ΔE 12.4, fair: the same colour family, but not a straight swap. Faded P.R.U. Blue is noticeably lighter, more saturated, cooler than Greatcoat Grey.

Can I use Faded P.R.U. Blue instead of Greatcoat Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Faded P.R.U. Blue is noticeably lighter, more saturated, cooler than Greatcoat Grey.

Can I use Greatcoat Grey instead of Faded P.R.U. Blue?

The same difference applies the other way round: Greatcoat Grey is noticeably darker, more muted, 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.