ΔE 11.6, fair: the same colour family, but not a straight swap. Earth is a little lighter, more muted, cooler than Blood Tracker Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Earth is a little lighter, more muted, cooler than Blood Tracker Brown.
The same difference applies the other way round: Blood Tracker Brown is a little darker, more saturated, 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 Blood Tracker Brown on the colour wheel See Earth on the colour wheel
All matches: Blood Tracker Brown equivalents · Earth equivalents