Satchel Brown vs Zombie Flesh

How close are they?

ΔE 16.5, loose: different enough that you should pick on purpose. Zombie Flesh is a little lighter, much more muted than Satchel Brown.

Can I use Zombie Flesh instead of Satchel Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Zombie Flesh is a little lighter, much more muted than Satchel Brown.

Can I use Satchel Brown instead of Zombie Flesh?

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

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.