ΔE 12.8, fair: the same colour family, but not a straight swap. Buff is more saturated, cooler than Buckskin Pale.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Buff is more saturated, cooler than Buckskin Pale.
The same difference applies the other way round: Buckskin Pale is more muted, 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 Buckskin Pale on the colour wheel See Buff on the colour wheel
All matches: Buckskin Pale equivalents · Buff equivalents