Astorath Red vs Sanguinem Red

How close are they?

ΔE 12.4, fair: the same colour family, but not a straight swap. Sanguinem Red is noticeably lighter than Astorath Red. They are different kinds of paint: Citadel Astorath Red is an opaque base/layer paint and Green Stuff World Sanguinem Red is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.

Can I use Sanguinem Red instead of Astorath Red?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Sanguinem Red is noticeably lighter than Astorath Red. They are different kinds of paint.

Can I use Astorath Red instead of Sanguinem Red?

The same difference applies the other way round: Astorath Red is noticeably darker.

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.