ΔE 12.3, fair: the same colour family, but not a straight swap. Terracotta is a little lighter, more muted than Khorne Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Terracotta is a little lighter, more muted than Khorne Red.
The same difference applies the other way round: Khorne Red is a little darker, 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 Khorne Red on the colour wheel See Terracotta on the colour wheel
All matches: Khorne Red equivalents · Terracotta equivalents