Steel Grey vs Dark Brown RLM61

How close are they?

ΔE 13.0, fair: the same colour family, but not a straight swap. Dark Brown RLM61 is a little lighter, more muted than Steel Grey.

Can I use Dark Brown RLM61 instead of Steel Grey?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Dark Brown RLM61 is a little lighter, more muted than Steel Grey.

Can I use Steel Grey instead of Dark Brown RLM61?

The same difference applies the other way round: Steel Grey is a little darker, 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.