ΔE 14.6, fair: the same colour family, but not a straight swap. Blood Thorn is a little darker, much more saturated than Terracota.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Blood Thorn is a little darker, much more saturated than Terracota.
The same difference applies the other way round: Terracota is a little lighter, much more muted.
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 Terracota on the colour wheel See Blood Thorn on the colour wheel
All matches: Terracota equivalents · Blood Thorn equivalents