ΔE 7.3, close: similar, with a visible difference side by side. Turquoise is a little darker, more saturated, warmer than Turnbull Turquoise. They are different kinds of paint: Army Painter Turnbull Turquoise is a one-coat contrast-style paint and Green Stuff World 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). Turquoise is a little darker, more saturated, warmer than Turnbull Turquoise. They are different kinds of paint.
The same difference applies the other way round: Turnbull Turquoise is a little lighter, more muted, 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 Turnbull Turquoise on the colour wheel See Turquoise on the colour wheel
All matches: Turnbull Turquoise equivalents · Turquoise equivalents