ΔE 13.3, fair: the same colour family, but not a straight swap. Screaming Skull is a little darker, more muted, cooler than Basic Skin Tone.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Screaming Skull is a little darker, more muted, cooler than Basic Skin Tone.
The same difference applies the other way round: Basic Skin Tone is a little lighter, more saturated, 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 Basic Skin Tone on the colour wheel See Screaming Skull on the colour wheel
All matches: Basic Skin Tone equivalents · Screaming Skull equivalents