Satchel Brown vs Demonic Skin

How close are they?

ΔE 15.7, loose: different enough that you should pick on purpose. Demonic Skin is a little lighter, cooler than Satchel Brown.

Can I use Demonic Skin instead of Satchel Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Demonic Skin is a little lighter, cooler than Satchel Brown.

Can I use Satchel Brown instead of Demonic Skin?

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