ΔE 12.7, fair: the same colour family, but not a straight swap. Life On Mars is more muted, warmer than Gemstone Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Life On Mars is more muted, warmer than Gemstone Red.
The same difference applies the other way round: Gemstone Red is more saturated, 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.
See Gemstone Red on the colour wheel See Life On Mars on the colour wheel
All matches: Gemstone Red equivalents · Life On Mars equivalents