ΔE 10.4, fair: the same colour family, but not a straight swap. Bloodstain Red is a little darker, more saturated, cooler than Umberroot.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Bloodstain Red is a little darker, more saturated, cooler than Umberroot.
The same difference applies the other way round: Umberroot is a little lighter, more muted, 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 Umberroot on the colour wheel See Bloodstain Red on the colour wheel
All matches: Umberroot equivalents · Bloodstain Red equivalents