Red Copper vs Life On Mars

How close are they?

ΔE 11.7, fair: the same colour family, but not a straight swap. Life On Mars is a little darker, more saturated than Red Copper.

Can I use Life On Mars instead of Red Copper?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Life On Mars is a little darker, more saturated than Red Copper.

Can I use Red Copper instead of Life On Mars?

The same difference applies the other way round: Red Copper is a little lighter, 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.