Wyldwood vs Zombie

How close are they?

ΔE 20.1, loose: different enough that you should pick on purpose. Zombie is a little lighter, more muted, cooler than Wyldwood.

Can I use Zombie instead of Wyldwood?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Zombie is a little lighter, more muted, cooler than Wyldwood.

Can I use Wyldwood instead of Zombie?

The same difference applies the other way round: Wyldwood is a little darker, more saturated, 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.