ΔE 12.9, fair: the same colour family, but not a straight swap. Tallarn Sand is a little darker, more muted than Ochre.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Tallarn Sand is a little darker, more muted than Ochre.
The same difference applies the other way round: Ochre is a little lighter, more saturated.
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 Ochre on the colour wheel See Tallarn Sand on the colour wheel
All matches: Ochre equivalents · Tallarn Sand equivalents