ΔE 10.2, fair: the same colour family, but not a straight swap. Faded P.R.U. Blue is cooler than Cold Armour.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Faded P.R.U. Blue is cooler than Cold Armour.
The same difference applies the other way round: Cold Armour is 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.
See Cold Armour on the colour wheel See Faded P.R.U. Blue on the colour wheel
All matches: Cold Armour equivalents · Faded P.R.U. Blue equivalents