ΔE 13.2, fair: the same colour family, but not a straight swap. German Red Brown is a little lighter, more muted, cooler than Brown Leather.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). German Red Brown is a little lighter, more muted, cooler than Brown Leather.
The same difference applies the other way round: Brown Leather is a little darker, more saturated, 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 Brown Leather on the colour wheel See German Red Brown on the colour wheel
All matches: Brown Leather equivalents · German Red Brown equivalents