ΔE 11.3, fair: the same colour family, but not a straight swap. Parasite Brown is a little darker, more saturated than Flame Orange.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Parasite Brown is a little darker, more saturated than Flame Orange.
The same difference applies the other way round: Flame Orange is a little lighter, more muted.
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 Flame Orange on the colour wheel See Parasite Brown on the colour wheel
All matches: Flame Orange equivalents · Parasite Brown equivalents