Orc Hide vs Pastel Green

How close are they?

ΔE 8.9, close: similar, with a visible difference side by side. Pastel Green is a little darker, more muted, warmer than Orc Hide.

Can I use Pastel Green instead of Orc Hide?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Pastel Green is a little darker, more muted, warmer than Orc Hide.

Can I use Orc Hide instead of Pastel Green?

The same difference applies the other way round: Orc Hide is a little lighter, more saturated, 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.