Red Copper vs Gold 79

How close are they?

ΔE 13.6, fair: the same colour family, but not a straight swap. Gold 79 is a little lighter, more saturated, warmer than Red Copper.

Can I use Gold 79 instead of Red Copper?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Gold 79 is a little lighter, more saturated, warmer than Red Copper.

Can I use Red Copper instead of Gold 79?

The same difference applies the other way round: Red Copper is a little darker, more muted, cooler.

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.