ΔE 15.3, loose: different enough that you should pick on purpose. Imrik Blue is more saturated, cooler than Matt Ultra Blue. They are different kinds of paint: AMMO by Mig Matt Ultra Blue is an ink, glaze or transparent paint and Citadel Imrik Blue is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Imrik Blue is more saturated, cooler than Matt Ultra Blue. They are different kinds of paint.
The same difference applies the other way round: Matt Ultra Blue is more muted, 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 Matt Ultra Blue on the colour wheel See Imrik Blue on the colour wheel
All matches: Matt Ultra Blue equivalents · Imrik Blue equivalents