ΔE 10.7, fair: the same colour family, but not a straight swap. Tan is a little darker, more saturated, warmer than Agate Skin.
✓ Herrick Games paint comparison chart lists these two as equivalents.
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 Agate Skin.
The same difference applies the other way round: Agate 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 Agate Skin on the colour wheel See Tan on the colour wheel
All matches: Agate Skin equivalents · Tan equivalents