ΔE 7.2, close: similar, with a visible difference side by side. Barbarian Skin is warmer than Middle Stone.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Barbarian Skin is warmer than Middle Stone.
The same difference applies the other way round: Middle Stone is 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 Middle Stone on the colour wheel See Barbarian Skin on the colour wheel
All matches: Middle Stone equivalents · Barbarian Skin equivalents