Agate Skin vs Seven Pillars of Wisdom

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Seven Pillars of Wisdom is more saturated than Agate Skin.

Can I use Seven Pillars of Wisdom instead of Agate Skin?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Seven Pillars of Wisdom is more saturated than Agate Skin.

Can I use Agate Skin instead of Seven Pillars of Wisdom?

The same difference applies the other way round: Agate Skin is more muted.

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.