Dark does ×1 to Electric

Generations VI to IX, single types. The other way round, Electric against Dark, is ×1.

69 Dark and 69 Electric species among the 1025 this site covers.

Attacker, Dragon and Dark Roaring Moon sprite

damage×1Generations VI to IX

Defender, Dragon and Electric Zekrom sprite

Zekrom #0644

Dark did not exist in Generation I, so Dark against Electric has no value there.

Strongest Dark attackers

Roaring Moon leads Dark at Atk 139

Sturdiest Electric defenders

Dual types that change the answer