ΔE 6.3, close: similar, with a visible difference side by side. Aethermatic Blue is a little lighter, cooler than Sky Blue. They are different kinds of paint: AMMO by Mig Sky Blue is an ink, glaze or transparent 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 6). Aethermatic Blue is a little lighter, cooler than Sky Blue. They are different kinds of paint.
The same difference applies the other way round: Sky Blue is a little darker, warmer.
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 Sky Blue on the colour wheel See Aethermatic Blue on the colour wheel
All matches: Sky Blue equivalents · Aethermatic Blue equivalents