ΔE 7.2, close: similar, with a visible difference side by side. Transparent Green is a little lighter, more saturated than Vulkan Green. They are different kinds of paint: Citadel Vulkan Green is an opaque base/layer paint and Pro Acryl Transparent Green 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). Transparent Green is a little lighter, more saturated than Vulkan Green. They are different kinds of paint.
The same difference applies the other way round: Vulkan 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 Vulkan Green on the colour wheel See Transparent Green on the colour wheel
All matches: Vulkan Green equivalents · Transparent Green equivalents