ΔE 8.9, close: similar, with a visible difference side by side. Flanker Blue is cooler than Armour Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Flanker Blue is cooler than Armour Grey.
The same difference applies the other way round: Armour Grey 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 Armour Grey on the colour wheel See Flanker Blue on the colour wheel
All matches: Armour Grey equivalents · Flanker Blue equivalents