ΔE 13.6, fair: the same colour family, but not a straight swap. Viridian Green is noticeably darker, more muted than Hazardous Smog.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Viridian Green is noticeably darker, more muted than Hazardous Smog.
The same difference applies the other way round: Hazardous Smog 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 Hazardous Smog on the colour wheel See Viridian Green on the colour wheel
All matches: Hazardous Smog equivalents · Viridian Green equivalents