ΔE 7.7, close: similar, with a visible difference side by side. Hexed Violet is a little lighter than Matt Purple. They are different kinds of paint: AMMO by Mig Matt Purple is an ink, glaze or transparent paint and Army Painter Hexed Violet is an opaque base/layer 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 8). Hexed Violet is a little lighter than Matt Purple. They are different kinds of paint.
The same difference applies the other way round: Matt Purple is a little darker.
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 Purple on the colour wheel See Hexed Violet on the colour wheel
All matches: Matt Purple equivalents · Hexed Violet equivalents