Peach vs Fire Dragon Bright

How close are they?

ΔE 18.7, loose: different enough that you should pick on purpose. Fire Dragon Bright is a little darker, more muted, warmer than Peach.

Can I use Fire Dragon Bright instead of Peach?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Fire Dragon Bright is a little darker, more muted, warmer than Peach.

Can I use Peach instead of Fire Dragon Bright?

The same difference applies the other way round: Peach is a little lighter, more saturated, 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.