ΔE 17.4, loose: different enough that you should pick on purpose. Pale Green is noticeably darker, more saturated than Contagion Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Pale Green is noticeably darker, more saturated than Contagion Green.
The same difference applies the other way round: Contagion Green is noticeably 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 Contagion Green on the colour wheel See Pale Green on the colour wheel
All matches: Contagion Green equivalents · Pale Green equivalents