ΔE 9.3, close: similar, with a visible difference side by side. Malignant Green is a little lighter, more muted than Pistachio. They are different kinds of paint: AMMO by Mig Pistachio is an opaque base/layer paint and Army Painter Malignant Green 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). Malignant Green is a little lighter, more muted than Pistachio. They are different kinds of paint.
The same difference applies the other way round: Pistachio is a little darker, 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.
See Pistachio on the colour wheel See Malignant Green on the colour wheel
All matches: Pistachio equivalents · Malignant Green equivalents