ΔE 10.5, fair: the same colour family, but not a straight swap. Ashen Brown is noticeably lighter, cooler than Ashroot.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Ashen Brown is noticeably lighter, cooler than Ashroot.
The same difference applies the other way round: Ashroot is noticeably darker, 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 Ashroot on the colour wheel See Ashen Brown on the colour wheel
All matches: Ashroot equivalents · Ashen Brown equivalents