ΔE 7.0, close: similar, with a visible difference side by side. Ink Dark Turquoise is a little lighter, more saturated than Unforgiven Green. They are different kinds of paint: Army Painter Unforgiven Green is an opaque base/layer paint and Vallejo Ink Dark Turquoise is an ink, glaze or transparent 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 7). Ink Dark Turquoise is a little lighter, more saturated than Unforgiven Green. They are different kinds of paint.
The same difference applies the other way round: Unforgiven Green is a little darker, more muted.
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 Unforgiven Green on the colour wheel See Ink Dark Turquoise on the colour wheel
All matches: Unforgiven Green equivalents · Ink Dark Turquoise equivalents