Agent Orange vs Inferno Red

How close are they?

ΔE 31.5, loose: different enough that you should pick on purpose. Inferno Red is noticeably darker, much more saturated, cooler than Agent Orange.

Can I use Inferno Red instead of Agent Orange?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 31). Inferno Red is noticeably darker, much more saturated, cooler than Agent Orange.

Can I use Agent Orange instead of Inferno Red?

The same difference applies the other way round: Agent Orange is noticeably lighter, much more muted, 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.