Orruk Flesh vs Permanent Green Light

How close are they?

ΔE 15.7, loose: different enough that you should pick on purpose. Permanent Green Light is a little lighter, much more saturated than Orruk Flesh.

Can I use Permanent Green Light instead of Orruk Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Permanent Green Light is a little lighter, much more saturated than Orruk Flesh.

Can I use Orruk Flesh instead of Permanent Green Light?

The same difference applies the other way round: Orruk Flesh is a little darker, much 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.