Cygor Brown vs Fairy Skin

How close are they?

ΔE 22.7, loose: different enough that you should pick on purpose. Fairy Skin is noticeably lighter, more saturated, cooler than Cygor Brown.

Can I use Fairy Skin instead of Cygor Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Fairy Skin is noticeably lighter, more saturated, cooler than Cygor Brown.

Can I use Cygor Brown instead of Fairy Skin?

The same difference applies the other way round: Cygor Brown is noticeably darker, 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.