ΔE 8.7, close: similar, with a visible difference side by side. Demon Blood is a little darker, more muted than Luxion Purple. They are different kinds of paint: Citadel Luxion Purple is a one-coat contrast-style paint and Vallejo Demon Blood is a fluorescent or effect paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Demon Blood is a little darker, more muted than Luxion Purple. They are different kinds of paint.
The same difference applies the other way round: Luxion Purple 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 Luxion Purple on the colour wheel See Demon Blood on the colour wheel
All matches: Luxion Purple equivalents · Demon Blood equivalents