Guilliman Flesh vs Ares Flesh

How close are they?

ΔE 9.6, close: similar, with a visible difference side by side. Ares Flesh is a little darker than Guilliman Flesh. They are different kinds of paint: Citadel Guilliman Flesh is a one-coat contrast-style paint and Two Thin Coats Ares Flesh is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.

Can I use Ares Flesh instead of Guilliman Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Ares Flesh is a little darker than Guilliman Flesh. They are different kinds of paint.

Can I use Guilliman Flesh instead of Ares Flesh?

The same difference applies the other way round: Guilliman Flesh 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.