ΔE 11.0, fair: the same colour family, but not a straight swap. Thondia Brown is more saturated, warmer than Tree Ancient.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Thondia Brown is more saturated, warmer than Tree Ancient.
The same difference applies the other way round: Tree Ancient is 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 Tree Ancient on the colour wheel See Thondia Brown on the colour wheel
All matches: Tree Ancient equivalents · Thondia Brown equivalents