ΔE 11.9, fair: the same colour family, but not a straight swap. Orange Brown is a little darker, more muted, warmer than Khardic Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Orange Brown is a little darker, more muted, warmer than Khardic Flesh.
The same difference applies the other way round: Khardic Flesh is a little lighter, more saturated, cooler.
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 Khardic Flesh on the colour wheel See Orange Brown on the colour wheel
All matches: Khardic Flesh equivalents · Orange Brown equivalents