ΔE 12.6, fair: the same colour family, but not a straight swap. Red Brown is more muted, warmer than Doombull Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Red Brown is more muted, warmer than Doombull Brown.
The same difference applies the other way round: Doombull Brown is more saturated, 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 Doombull Brown on the colour wheel See Red Brown on the colour wheel
All matches: Doombull Brown equivalents · Red Brown equivalents