ΔE 13.9, fair: the same colour family, but not a straight swap. Elf Skin Tone is a little lighter, cooler than Orange Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Elf Skin Tone is a little lighter, cooler than Orange Brown.
The same difference applies the other way round: Orange Brown is a little darker, 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 Orange Brown on the colour wheel See Elf Skin Tone on the colour wheel
All matches: Orange Brown equivalents · Elf Skin Tone equivalents