Greenskin vs Phthalo Green (Blue Shade)

How close are they?

ΔE 9.3, close: similar, with a visible difference side by side. Phthalo Green (Blue Shade) is more muted, cooler than Greenskin.

Can I use Phthalo Green (Blue Shade) instead of Greenskin?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Phthalo Green (Blue Shade) is more muted, cooler than Greenskin.

Can I use Greenskin instead of Phthalo Green (Blue Shade)?

The same difference applies the other way round: Greenskin is more saturated, 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.