ΔE 13.3, fair: the same colour family, but not a straight swap. Cuirass Leather is a little lighter, more saturated than Dark Leather.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Cuirass Leather is a little lighter, more saturated than Dark Leather.
The same difference applies the other way round: Dark Leather 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.
See Dark Leather on the colour wheel See Cuirass Leather on the colour wheel
All matches: Dark Leather equivalents · Cuirass Leather equivalents