ΔE 13.4, fair: the same colour family, but not a straight swap. Orange Brown is a little darker, more saturated than Tanned Leather.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Orange Brown is a little darker, more saturated than Tanned Leather.
The same difference applies the other way round: Tanned Leather is a little lighter, 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 Tanned Leather on the colour wheel See Orange Brown on the colour wheel
All matches: Tanned Leather equivalents · Orange Brown equivalents