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