ΔE 5.6, very close: most people won’t see a difference side by side. Hellblau RLM 78 is more saturated, cooler than Armour Grey.
Yes, for most jobs. Very close match (ΔE 6). Hellblau RLM 78 is more saturated, cooler than Armour Grey.
The same difference applies the other way round: Armour Grey is 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.
See Armour Grey on the colour wheel See Hellblau RLM 78 on the colour wheel
All matches: Armour Grey equivalents · Hellblau RLM 78 equivalents