Astorath Red vs Amaranth Red

How close are they?

ΔE 8.1, close: similar, with a visible difference side by side. Amaranth Red is a little lighter than Astorath Red.

Can I use Amaranth Red instead of Astorath Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Amaranth Red is a little lighter than Astorath Red.

Can I use Astorath Red instead of Amaranth Red?

The same difference applies the other way round: Astorath Red is a little 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.