ΔE 10.3, fair: the same colour family, but not a straight swap. Dark Purple is more saturated, cooler than Black Leather.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Dark Purple is more saturated, cooler than Black Leather.
The same difference applies the other way round: Black Leather is more muted, warmer.
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 Black Leather on the colour wheel See Dark Purple on the colour wheel
All matches: Black Leather equivalents · Dark Purple equivalents