Sandstone vs Hemp

How close are they?

ΔE 9.4, close: similar, with a visible difference side by side. Hemp is a little darker, more saturated, cooler than Sandstone.

Can I use Hemp instead of Sandstone?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Hemp is a little darker, more saturated, cooler than Sandstone.

Can I use Sandstone instead of Hemp?

The same difference applies the other way round: Sandstone 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.