ΔE 16.2, loose: different enough that you should pick on purpose. Off White is a little darker, much more muted, warmer than Arid Earth.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Off White is a little darker, much more muted, warmer than Arid Earth.
The same difference applies the other way round: Arid Earth is a little lighter, much 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 Arid Earth on the colour wheel See Off White on the colour wheel
All matches: Arid Earth equivalents · Off White equivalents