Kislev Flesh vs Basic Skin Tone

How close are they?

ΔE 6.5, close: similar, with a visible difference side by side. Basic Skin Tone is more saturated than Kislev Flesh.

Can I use Basic Skin Tone instead of Kislev Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Basic Skin Tone is more saturated than Kislev Flesh.

Can I use Kislev Flesh instead of Basic Skin Tone?

The same difference applies the other way round: Kislev Flesh is more muted.

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.