ΔE 9.1, close: similar, with a visible difference side by side. Aethermatic Blue is a little darker than Turquoise. They are different kinds of paint: AMMO by Mig Turquoise is an opaque base/layer paint and Citadel Aethermatic Blue is a one-coat contrast-style 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). Aethermatic Blue is a little darker than Turquoise. They are different kinds of paint.
The same difference applies the other way round: Turquoise is a little lighter.
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 Turquoise on the colour wheel See Aethermatic Blue on the colour wheel
All matches: Turquoise equivalents · Aethermatic Blue equivalents