Black Metal vs Rough Iron

How close are they?

ΔE 12.2, fair: the same colour family, but not a straight swap. Rough Iron is a little darker, more muted than Black Metal.

Can I use Rough Iron instead of Black Metal?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Rough Iron is a little darker, more muted than Black Metal.

Can I use Black Metal instead of Rough Iron?

The same difference applies the other way round: Black Metal is a little lighter, 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.