Dark Skin Wash vs Agrax Earthshade

How close are they?

ΔE 17.6, loose: different enough that you should pick on purpose. Agrax Earthshade is noticeably lighter, more saturated, warmer than Dark Skin Wash.

Can I use Agrax Earthshade instead of Dark Skin Wash?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Agrax Earthshade is noticeably lighter, more saturated, warmer than Dark Skin Wash.

Can I use Dark Skin Wash instead of Agrax Earthshade?

The same difference applies the other way round: Dark Skin Wash is noticeably 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.