Old Brass vs Gunmetal Blue

How close are they?

ΔE 12.8, fair: the same colour family, but not a straight swap. Gunmetal Blue is a little lighter, more saturated than Old Brass.

Can I use Gunmetal Blue instead of Old Brass?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Gunmetal Blue is a little lighter, more saturated than Old Brass.

Can I use Old Brass instead of Gunmetal Blue?

The same difference applies the other way round: Old Brass is a little darker, more muted.

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.