ΔE 19.4, loose: different enough that you should pick on purpose. Parasite Brown is noticeably darker, warmer than Agent Orange.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Parasite Brown is noticeably darker, warmer than Agent Orange.
The same difference applies the other way round: Agent Orange is noticeably lighter, 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.
See Agent Orange on the colour wheel See Parasite Brown on the colour wheel
All matches: Agent Orange equivalents · Parasite Brown equivalents