ΔE 12.4, fair: the same colour family, but not a straight swap. Rawhide Brown is a little lighter, more saturated, warmer than Dark Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Rawhide Brown is a little lighter, more saturated, warmer than Dark Brown.
The same difference applies the other way round: Dark Brown is a little darker, 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 Dark Brown on the colour wheel See Rawhide Brown on the colour wheel
All matches: Dark Brown equivalents · Rawhide Brown equivalents