ΔE 12.3, fair: the same colour family, but not a straight swap. Forged Red is a little lighter, more saturated, cooler than Fire Opal.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Forged Red is a little lighter, more saturated, cooler than Fire Opal.
The same difference applies the other way round: Fire Opal is a little darker, 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.
See Fire Opal on the colour wheel See Forged Red on the colour wheel
All matches: Fire Opal equivalents · Forged Red equivalents