ΔE 10.9, fair: the same colour family, but not a straight swap. Black Wash is a little lighter, more muted than Andalusian Earth.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Black Wash is a little lighter, more muted than Andalusian Earth.
The same difference applies the other way round: Andalusian Earth is a little darker, more saturated.
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 Andalusian Earth on the colour wheel See Black Wash on the colour wheel
All matches: Andalusian Earth equivalents · Black Wash equivalents