Surfer Orc Flesh vs Light Emerald

How close are they?

ΔE 19.4, loose: different enough that you should pick on purpose. Light Emerald is noticeably darker, much more muted, cooler than Surfer Orc Flesh.

Can I use Light Emerald instead of Surfer Orc Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Light Emerald is noticeably darker, much more muted, cooler than Surfer Orc Flesh.

Can I use Surfer Orc Flesh instead of Light Emerald?

The same difference applies the other way round: Surfer Orc Flesh is noticeably lighter, much more saturated, 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.