Kobold Skin vs Thar Brown

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Thar Brown is more muted, cooler than Kobold Skin.

Can I use Thar Brown instead of Kobold Skin?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Thar Brown is more muted, cooler than Kobold Skin.

Can I use Kobold Skin instead of Thar Brown?

The same difference applies the other way round: Kobold Skin is more saturated, 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.