Flayed One Flesh vs Pink Flesh

How close are they?

ΔE 17.2, loose: different enough that you should pick on purpose. Pink Flesh is a little darker, more saturated, cooler than Flayed One Flesh.

Can I use Pink Flesh instead of Flayed One Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Pink Flesh is a little darker, more saturated, cooler than Flayed One Flesh.

Can I use Flayed One Flesh instead of Pink Flesh?

The same difference applies the other way round: Flayed One Flesh is a little lighter, 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.