Hellblau RLM 78 vs Administratum Grey

How close are they?

ΔE 13.6, fair: the same colour family, but not a straight swap. Administratum Grey is a little darker, much more muted than Hellblau RLM 78.

Can I use Administratum Grey instead of Hellblau RLM 78?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Administratum Grey is a little darker, much more muted than Hellblau RLM 78.

Can I use Hellblau RLM 78 instead of Administratum Grey?

The same difference applies the other way round: Hellblau RLM 78 is a little lighter, much more saturated.

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.