Asurmen Blue vs Cerulean Blue Deep

How close are they?

ΔE 13.1, fair: the same colour family, but not a straight swap. Cerulean Blue Deep is noticeably darker, more muted, warmer than Asurmen Blue. They are different kinds of paint: Citadel Asurmen Blue is a one-coat contrast-style paint and Golden Cerulean Blue Deep is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.

Can I use Cerulean Blue Deep instead of Asurmen Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Cerulean Blue Deep is noticeably darker, more muted, warmer than Asurmen Blue. They are different kinds of paint.

Can I use Asurmen Blue instead of Cerulean Blue Deep?

The same difference applies the other way round: Asurmen Blue is noticeably lighter, more saturated, cooler.

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.