Wildling Flesh vs Red Oxide Tint

How close are they?

ΔE 16.4, loose: different enough that you should pick on purpose. Red Oxide Tint is noticeably darker, more muted than Wildling Flesh.

Can I use Red Oxide Tint instead of Wildling Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Red Oxide Tint is noticeably darker, more muted than Wildling Flesh.

Can I use Wildling Flesh instead of Red Oxide Tint?

The same difference applies the other way round: Wildling Flesh is noticeably lighter, 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.