ΔE 10.7, fair: the same colour family, but not a straight swap. Tan is a little darker, more saturated, warmer than Weathered Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Tan is a little darker, more saturated, warmer than Weathered Skin.
The same difference applies the other way round: Weathered Skin is a little lighter, more muted, 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 Weathered Skin on the colour wheel See Tan on the colour wheel
All matches: Weathered Skin equivalents · Tan equivalents