ΔE 13.6, fair: the same colour family, but not a straight swap. Thondia Brown is a little darker, more saturated, warmer than Leather.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Thondia Brown is a little darker, more saturated, warmer than Leather.
The same difference applies the other way round: Leather is a little lighter, more muted, 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 Leather on the colour wheel See Thondia Brown on the colour wheel
All matches: Leather equivalents · Thondia Brown equivalents