Canvas vs Undead Flesh

How close are they?

ΔE 9.9, close: similar, with a visible difference side by side. Undead Flesh is more saturated, cooler than Canvas.

Can I use Undead Flesh instead of Canvas?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Undead Flesh is more saturated, cooler than Canvas.

Can I use Canvas instead of Undead Flesh?

The same difference applies the other way round: Canvas is more muted, 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.