Flame Orange vs Nomad Flesh

How close are they?

ΔE 15.3, loose: different enough that you should pick on purpose. Nomad Flesh is a little darker, more muted, cooler than Flame Orange.

Can I use Nomad Flesh instead of Flame Orange?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Nomad Flesh is a little darker, more muted, cooler than Flame Orange.

Can I use Flame Orange instead of Nomad Flesh?

The same difference applies the other way round: Flame Orange is a little lighter, 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.