ΔE 10.9, fair: the same colour family, but not a straight swap. Parasite Brown is noticeably darker, more muted than Lugganath Orange.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Parasite Brown is noticeably darker, more muted than Lugganath Orange.
The same difference applies the other way round: Lugganath Orange is noticeably lighter, more saturated.
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 Lugganath Orange on the colour wheel See Parasite Brown on the colour wheel
All matches: Lugganath Orange equivalents · Parasite Brown equivalents