Old Copper vs Imperial Gold

How close are they?

ΔE 10.3, fair: the same colour family, but not a straight swap. Imperial Gold is a little darker, more muted than Old Copper.

Can I use Imperial Gold instead of Old Copper?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Imperial Gold is a little darker, more muted than Old Copper.

Can I use Old Copper instead of Imperial Gold?

The same difference applies the other way round: Old Copper 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.