Kobold Skin vs Hunter's Quiver

How close are they?

ΔE 15.5, loose: different enough that you should pick on purpose. Hunter's Quiver is noticeably darker, more muted than Kobold Skin.

Can I use Hunter's Quiver instead of Kobold Skin?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Hunter's Quiver is noticeably darker, more muted than Kobold Skin.

Can I use Kobold Skin instead of Hunter's Quiver?

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

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.