Schwarzgrau RLM 66 vs Mechanicus Standard Grey

How close are they?

ΔE 12.8, fair: the same colour family, but not a straight swap. Mechanicus Standard Grey is noticeably lighter than Schwarzgrau RLM 66.

Can I use Mechanicus Standard Grey instead of Schwarzgrau RLM 66?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Mechanicus Standard Grey is noticeably lighter than Schwarzgrau RLM 66.

Can I use Schwarzgrau RLM 66 instead of Mechanicus Standard Grey?

The same difference applies the other way round: Schwarzgrau RLM 66 is noticeably darker.

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.