ΔE 6.8, close: similar, with a visible difference side by side. Permanent Green Light is a little darker, cooler than Orruk Flesh. They are different kinds of paint: Citadel Orruk Flesh is an opaque base/layer paint and Golden Permanent Green Light 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). Permanent Green Light is a little darker, cooler than Orruk Flesh. They are different kinds of paint.
The same difference applies the other way round: Orruk Flesh is a little lighter, 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 Orruk Flesh on the colour wheel See Permanent Green Light on the colour wheel
All matches: Orruk Flesh equivalents · Permanent Green Light equivalents