ΔE 11.2, fair: the same colour family, but not a straight swap. Buff is a little darker, more muted than Tanned Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Buff is a little darker, more muted than Tanned Skin.
The same difference applies the other way round: Tanned Skin is a little lighter, more saturated.
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 Tanned Skin on the colour wheel See Buff on the colour wheel
All matches: Tanned Skin equivalents · Buff equivalents