Permanent Green Light vs Sick Green

How close are they?

ΔE 7.7, close: similar, with a visible difference side by side. Sick Green is warmer than Permanent Green Light.

Can I use Sick Green instead of Permanent Green Light?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Sick Green is warmer than Permanent Green Light.

Can I use Permanent Green Light instead of Sick Green?

The same difference applies the other way round: Permanent Green Light is 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.