Direct indemnification claims under § 1983 are dismissed because § 1983 does not provide an express right of indemnification or contribution, and claims must involve actions under color of state law, which typically does not apply to third-party defendants.
For example: A city sued under § 1983 for police misconduct cannot seek indemnification from a third-party equipment supplier; this does not fall within the scope of § 1983 as the supplier does not act under color of state law.