ΔE 12.8, fair: the same colour family, but not a straight swap. Red Oxide Tint is a little darker, more saturated, cooler than Kobold Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Red Oxide Tint is a little darker, more saturated, cooler than Kobold Skin.
The same difference applies the other way round: Kobold Skin is a little lighter, more muted, 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.
See Kobold Skin on the colour wheel See Red Oxide Tint on the colour wheel
All matches: Kobold Skin equivalents · Red Oxide Tint equivalents