ΔE 9.6, close: similar, with a visible difference side by side. Transparent Turquoise is a little darker, warmer than Deep Azure. They are different kinds of paint: Army Painter Deep Azure is an opaque base/layer paint and Green Stuff World Transparent 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 10). Transparent Turquoise is a little darker, warmer than Deep Azure. They are different kinds of paint.
The same difference applies the other way round: Deep Azure is a little lighter, cooler.
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 Deep Azure on the colour wheel See Transparent Turquoise on the colour wheel
All matches: Deep Azure equivalents · Transparent Turquoise equivalents