ΔE 10.4, fair: the same colour family, but not a straight swap. Earth is a little lighter, more saturated, warmer than Arabic Shadow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Earth is a little lighter, more saturated, warmer than Arabic Shadow.
The same difference applies the other way round: Arabic Shadow is a little darker, more muted, 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 Arabic Shadow on the colour wheel See Earth on the colour wheel
All matches: Arabic Shadow equivalents · Earth equivalents