ΔE 9.3, close: similar, with a visible difference side by side. Cobalt Turquoise is a little lighter, cooler than Stegadon Scale Green. They are different kinds of paint: Citadel Stegadon Scale Green is an opaque base/layer paint and Golden Cobalt 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 9). Cobalt Turquoise is a little lighter, cooler than Stegadon Scale Green. They are different kinds of paint.
The same difference applies the other way round: Stegadon Scale Green is a little darker, warmer.
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 Stegadon Scale Green on the colour wheel See Cobalt Turquoise on the colour wheel
All matches: Stegadon Scale Green equivalents · Cobalt Turquoise equivalents