Old Gold vs True Copper

How close are they?

ΔE 10.7, fair: the same colour family, but not a straight swap. True Copper is a little lighter, more saturated than Old Gold.

Can I use True Copper instead of Old Gold?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). True Copper is a little lighter, more saturated than Old Gold.

Can I use Old Gold instead of True Copper?

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