Nomad Flesh vs Medium Flesh

How close are they?

ΔE 15.5, loose: different enough that you should pick on purpose. Medium Flesh is a little lighter, much more saturated than Nomad Flesh.

Can I use Medium Flesh instead of Nomad Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Medium Flesh is a little lighter, much more saturated than Nomad Flesh.

Can I use Nomad Flesh instead of Medium Flesh?

The same difference applies the other way round: Nomad Flesh is a little darker, much more muted.

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.