Witching Hour Blue vs Azure

How close are they?

ΔE 10.0, close: similar, with a visible difference side by side. Azure is more muted than Witching Hour Blue.

Can I use Azure instead of Witching Hour Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Azure is more muted than Witching Hour Blue.

Can I use Witching Hour Blue instead of Azure?

The same difference applies the other way round: Witching Hour Blue is 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.