Warpstone Glow vs Angel Green

How close are they?

ΔE 9.2, close: similar, with a visible difference side by side. Angel Green is a little darker than Warpstone Glow.

Can I use Angel Green instead of Warpstone Glow?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Angel Green is a little darker than Warpstone Glow.

Can I use Warpstone Glow instead of Angel Green?

The same difference applies the other way round: Warpstone Glow is a little lighter.

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.