ΔE 14.0, fair: the same colour family, but not a straight swap. Dirt is a little lighter, much more muted, cooler than Gnoll Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Dirt is a little lighter, much more muted, cooler than Gnoll Brown.
The same difference applies the other way round: Gnoll Brown is a little darker, much more saturated, 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 Gnoll Brown on the colour wheel See Dirt on the colour wheel
All matches: Gnoll Brown equivalents · Dirt equivalents