ΔE 11.4, fair: the same colour family, but not a straight swap. Dark Rose is a little lighter, cooler than Red Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Dark Rose is a little lighter, cooler than Red Brown.
The same difference applies the other way round: Red Brown is a little darker, 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 Red Brown on the colour wheel See Dark Rose on the colour wheel
All matches: Red Brown equivalents · Dark Rose equivalents