Terre Verte Hue vs Green Sky

How close are they?

ΔE 9.1, close: similar, with a visible difference side by side. Green Sky is a little darker, cooler than Terre Verte Hue.

Can I use Green Sky instead of Terre Verte Hue?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Green Sky is a little darker, cooler than Terre Verte Hue.

Can I use Terre Verte Hue instead of Green Sky?

The same difference applies the other way round: Terre Verte Hue 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.