Ungor Flesh vs Fairy Flesh

How close are they?

ΔE 17.5, loose: different enough that you should pick on purpose. Fairy Flesh is noticeably lighter, cooler than Ungor Flesh.

Can I use Fairy Flesh instead of Ungor Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Fairy Flesh is noticeably lighter, cooler than Ungor Flesh.

Can I use Ungor Flesh instead of Fairy Flesh?

The same difference applies the other way round: Ungor Flesh is noticeably 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.