ΔE 14.9, fair: the same colour family, but not a straight swap. Warm Grey is much more muted, cooler than Basic Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Warm Grey is much more muted, cooler than Basic Skin.
The same difference applies the other way round: Basic Skin is much 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 on the colour wheel See Warm Grey on the colour wheel
All matches: Basic Skin equivalents · Warm Grey equivalents