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