ΔE 13.5, fair: the same colour family, but not a straight swap. Violet Oxide is a little darker, more saturated, cooler than Dryad Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Violet Oxide is a little darker, more saturated, cooler than Dryad Brown.
The same difference applies the other way round: Dryad Brown is a little lighter, more muted, 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 Dryad Brown on the colour wheel See Violet Oxide on the colour wheel
All matches: Dryad Brown equivalents · Violet Oxide equivalents