Emberveil vs Permanent Orange

How close are they?

ΔE 15.3, loose: different enough that you should pick on purpose. Permanent Orange is a little lighter, warmer than Emberveil.

Can I use Permanent Orange instead of Emberveil?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Permanent Orange is a little lighter, warmer than Emberveil.

Can I use Emberveil instead of Permanent Orange?

The same difference applies the other way round: Emberveil is a little darker, cooler.

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.