Agent Orange vs Fire Dragon Bright

How close are they?

ΔE 21.9, loose: different enough that you should pick on purpose. Fire Dragon Bright is more saturated, warmer than Agent Orange.

Can I use Fire Dragon Bright instead of Agent Orange?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Fire Dragon Bright is more saturated, warmer than Agent Orange.

Can I use Agent Orange instead of Fire Dragon Bright?

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